So, here's a fun thing to hopefully tide you over a bit while I work on the update (sorry stuff involving paychecks and law school acceptance has come up and delayed me, though I'm still confident I can get out something this week). This list is based mostly on the "incomplete list of the types/schools of magic and as such it's very much misleading if taken as an objective concrete fact. Every point being made here can be debated even if I am putting forth my own arguments for it. I hope you guys enjoy.
Who is the Best at Each School of Magic?
Before I get into the list I do want to make a few disclaimers regarding how the list works.
Firstly, and foremostly the list is restricted solely to human entities currently alive by the time of the quest. Including gods, demons, aliens and other such outside context entities in the list felt a little disingenuous and it would make some categories incredibly hard to determine. Furthermore, I wanted to keep it focused only on individuals who are alive by the time of the quest and who are active magic users in order to both simplify things and make it more relevant to quest planning.
Secondly, this list is all in good fun and as such I will be pointing out that ranking "the best" is a little arbitrary when the divisions between schools of magic are very much not clear cut and don't go cleanly at all. As such a lot of the arguments put forth here could be made for ranking someone as the best in another category.
Thirdly this list is not a "power ranking" and is not to be taken as a sign that these individuals are the best in a fight necessarily. I prioritized ranking breadth and depth of knowledge, ability to use, scale of magical ability and individual innovation over "who can X the hardest". As such the individuals listed here are not necessarily the greatest human magic users in terms of power level but rather in terms of knowledge level.
With those point illustrated I'd like to get to the fun stuff. Feel free to share your own thoughts and opinions
Necromancy: Felix Faust
In my opinion the person I would rank as the best necromancer is Felix Faust. While he did kind of pervert a lot of the discipline and bias people against the art, as well as blending in a good deal of diabolism and such, Felix Faust's contributions to the field of necromancy and his understanding of the soul and ease of use in working with it are enough that I would consider him the best at the subject.
Felix Faust is an utter and absolute shitbag of a human being and is not someone to be admired but he has cheated death for so long and effectively done "horcruxes on crack" to the point where it can be argued that almost everything he does is to some degree or another necromancy because he's mostly dead. Granted he is still "alive" enough to count for this list, but Felix Faust's track record managed to beat out other contenders in the running, especially considering he's one of the few people to specialize primarily in necromancy and thus get a leg up on most magic users who only lightly dabble in it.
Blood Magic: Brother Blood
Blood magic was a tough one to figure out. There are a lot of individuals who gain magical power through a bloodline of some sort so it wasn't clean. That being said I think Brother Blood just barely manages to come out on top.
Admittedly the ritual murder of a father by a son so that the son can inherit the father's knowledge and power is a dark act but it's a whole lot more active than most blood magic being practiced, it's something that potentially gets exponentially stronger. It's also very clearly blood magic that's being involved and by extension it turns everything he does into an act of blood magic. Beyond that Brother Blood has other tricks he can use Blood Magic for. Using Raven as a conduit for Trigon, using Beast Boy as a conduit to the animal kingdom and more. I mean it might be a bit of a copout to say that Brother Blood is the best user of blood magic but at the same time I feel he has the name for a reason.
Animation: Kraklow
Here's another tricky one. Morgaine Le Fay was actually in the running for this for her creation of multiple homunculi children. However, while Morgaine could certainly turn sticks act like serpents and perform other feats of animation, I wanted to give the top spot to a magic user who more clearly animates inanimate things and thus makes more use of it in a clean sense of it. As such Kraklow ended up on top.
Kraklow is the best at "pure" animation due to his extensive work in bringing clay to life and using it to have various forms. Kraklow isn't notable for his magical expertise in much else but his amount of knowledge on how to animate virtual armies of clay entities is enough to earn him this spot in my opinion. It wasn't a clean victory but considering he's nominally a part of a group known as the "forgotten villains" I think it's still a win for him
Divination: Madame Xanadu
Madame Xanadu is the character who in my opinion is most clearly linked to divination. Her whole schtick is tarot reading and seeing the future. If aliens were allowed on the list Atrocitus would arguably out match her and Madame Xanadu is by no means a perfect seer but she's up there. She naturally can scry and use more mundane divination but I felt the sheer amount of peering into the future and gaining revelations about people through magic Madame Xanadu could achieve earned her a spot above most others. Morgaine Le Fay's sister does clearly have her beat in this category and while Madame Xanadu kind of has a tendency to not user her prescience very effectively she is the character who I believe qualifies as the greatest human at divination.
Enchantment: Merlin
So, get ready to see Merlin's name pop up again and again because he's both not dead and arguably the greatest in many, many fields of magic. What earns him his place as the greatest at enchantment is the creation of his swords. Those alone can potentially let a mortal human take on a god through the strength of their enchantments. And if that wasn't enough almost everything magical or enchanted about Camelot can probably trace its way back to Merlin (and if not Merlin then someone Merlin taught). Merlin's skill at enchantment is so head and shoulders above the rest that even insanely powerful entities would struggle to get around his work or even attempt to replicate it. When you're able to match the entities removed from the running in order to make the list a little fairer, you've more than earned the spot.
Exorcism: Merlin
Hello here's Merlin as the best at something again. There aren't a lot of people who purely work in exorcism. As such Merlin kind of one this one as he has numerous feats of banishing souls to other dimensions and such. As such he kind of won this one by default even if he didn't contribute a lot to the field and hasn't shaped a lot of modern exorcism. All that being said he is still quite capable of it. The man was quite literally conceived as a way to get back at incredibly powerful demons so naturally he's very good at exorcising them.
Transmutation: The Wizard Shazam/Mamaragan
The wizard Shazam also kind of one this by default. Not a lot of magic users have very clean feats of transmutation and while Shazam isn't a name that comes to mind when it comes to the development of Transmutation, he is quite capable of it. Beside physically altering the shape of the champions he empowers to creating and maintaining the Rock of Eternity, Shazam has incredible feats of transmutation and is quite capable of incredible things with it. This is one I would be interested in seeing who people would challenge as potentially "better".
Curses/Black Magic: Morgaine Le Fay
Morgaine Le Fay finally earns her spot as the best in something. Morgaine Le Fay throughout all of DC comics and DC related media is nigh universally remarked upon as a master of black magic. In the DCQU this has translated to her excelling at curses and destructive magic.
Her skill in this kind of sorcery enabled her to bring down Camelot and is one of the branches where she innovated on her own instead of learning from Merlin. Morgaine has had centuries to improve her skills and as such she's only gotten better at it with time.
Restoration/White Magic: Wotan
Wotan is a weird one, but I feel that he still is arguably the greatest Restoration/White Magic user in the DCQU for the simple fact of their feat of self-resurrection. Self-healing is still healing after all, and Wotan is effectively immortal due to the fact that no one has figured out a way around their white magic to permanently put them down. Wotan can also do wards and most other more unique forms of white magic but I feel that achieving a level of immortality greater than powerful older sorcerors like Felix Faust is more deserving and earns Wotan the top spot here.
Invocation: The Wizard Shazam/Mamaragan
Shazam easily takes the top spot here. The empowerment of Black Adam alone requires drawing upon the powers of multiple gods and Shazam has managed that several dozen times over without actually ever negotiating with any of these entities. His feats in this realm are so insane that no one else even comes close.
Conjuration: Merlin
Merlin is back for the third time and this time he's taking home the gold in conjuration. Merlin is someone who has an argument for almost any school of magic but in the case of conjuration, I feel the creation of his swords is a feat that required it and coupled with his quasi-immortality that let him learn and live for centuries, he's almost certainly the very best at conjuration
Order Magic: Kent Nelson
This one might be a bit of a cop out but there is a reason why Kent Nelson is the ideal host for Nabu. Additionally, he's been the host of a Lord of Order since WW2 and as such he's been able to more than pick up a bit of understanding in how order magic works. He's not incredibly powerful but he is someone who deserves the spot simply for how much he knows and understands.
Chaos Magic: The Curse
Chaos magic was incredibly hard to find my pick for, due to how all the greatest users of it are almost always very, very non-human, but in the end I settled on The Curse as my pick. The Curse is an ancient Mesopotamian warlord who learned magic and has since made himself immortal (though he's stuck in a helmet and needs to possess people). The Curse does know chaos magic and I figured time would ultimately give him the edge to win out in this regard as he's one of the few humans noted to specialize in it and he's certainly the longest lived individual of that group.
Diabolism: John Constantine
Constantine's placement is weird. He's definitely not the most powerful and he's definitely not the most knowledgeable. What I believe earns him the spot as "the best" is the fact that most diabolists end up being screwed over or controlled by demons and John Constantine tends to avoid that much better than most while still making deals with powerful entities. More famous diabolists like Felix Faust or Brother Blood have knowledge and skills but are entirely on the back foot when working with demons and arguably are constantly needing to work to not have things blow up in their face. John Constantine on the other hand is able to mostly come out on top if not always unscathed.
On top of that while Constantine is not the most powerful nor the most knowledgeable, he's not exactly a weakling and he's got a lot of knowledge including old Sumerian stuff that most people don't use. He's probably a leading expert in Diabolism if not the leading expert (which is probably either Merlin or Jason Blood or Felix Faust) and that coupled with his other traits is what I feel makes him the best at diabolism.
Transposition: Ian Karkull
Ian Karkull is interesting. He wasn't very notable when he was active in WW2 though he was powerful. However, he became exponentially more powerful after Vandal Savage attempted to "dispose of him" and he got trapped in the Shadowlands. Ian Karkull has the usual bevy of transposition powers (flight teleportation etc.), but what I think clinches him the top spot is his use of magic to enter and exit the Shadowlands, a whole separate dimension that most people don't touch. It's not exactly willingly but I do think it counts and it puts him a step above most other people especially considering he can also drag other people back in.
Thaumaturgy: Merlin
Initially I'd put the winner of this category as Rama Khan but after a review by GhostKing 666 which pointed out a mistake in the understanding of events I'd been working with, I had to reassess my evaluation as most of the modern day Rama Khan's achievements were passive in nature. While I could make the argument that Jarhanpur's power was Rama Khan's due to how Jarhanpur's magic work and that the first Rama Khan likely set up magic to make it work that way, the fact of the matter is that feels a little too iffy for me to be solid on it and the first Rama Khan is very definitively dead so unless I'm willing to make the case that Billy Batson's feats are Hercules' then I'm not exactly in a great position.
As such I had to review the many list of candidates that I had for this category. I did think it over for a few minutes but in the end it came down to being between Merlin and Shazam. And while Shazam has some impressive feats, he's ultimately a lot less impressive in the more overtly thaumaturgical department. Both he and Merlin obviously know a lot about magic but Merlin has a lot more obvious dabbling in various other disciplines and has also taught magic to a lot more people which suggests that he is comfortable working with magic that isn't inherently his own. And each of his students went on to be incredibly good at what they do (Morgaine made the list and Jason Blood was a solid candidate in a few categories). None of the people Shazam taught were nearly as impressive. Even beyond that Tim Hunter, arguably the character with the most magical potential and one who is considered to be tied incredibly closely to thaumaturgy due to his nature, is actively compared to Merlin and not Shazam. As such Merlin ends up edging out Shazam as it seems more logical to me that the character who is widely believed to be the greatest mortal magic user ever with feats of thaumaturgy and various evidence suggesting he's very good at it beats out the opposition.
So yeah, Merlin ends up cracking this four times (twice as much as his competition) which should let you know both how absolutely bonkers he is, and by extension the utterly insane potential of Tim Hunter.