What about in the context of worm?
And oh yeah, I just noticed you're the author of Divine Bureaucracy. That's my first exalted fanfic I read. Thanks.
An Exalted-style Sorcerer in Worm?
Look at the effects Sorcery can produce at the Terrestrial level.
Death of Obsidian Butterflies/Flight of the Brilliant Raptor basically makes them an artillery piece. Too slow to be a solo-win against armed humans, much less most capes. Good for hitting hardier capes, assuming someone else does most of the fighting.
Invulnerable Skin of Bronze should turn the character about as durable as someone in power armor or maybe a low/mid-tier brute. Wood Dragons Claw is decent offense, but only comparable to low-tier brutes/strikers.
Mists of Eventide is probably the best combat option since it is non-lethal, but the area-effect, set-up time and escapeable area are exploitable weaknesses.
Cirrus Skiff and Stormwind Rider give flight, with the related advantages.
Infallible Messenger, Silent Words of Dreams and Nightmare and similar effects give untraceable communication and limited remote observation. However, even mundane technology can get similar effects, never mind tinker tech.
The most important spells would be those that have hard-to-replicate effects - such as Corrupted Words, which is extremely valuable for keeping secrets.
Well, that's assuming Minion Summoning - whether Demons or Elementals - is not in play. If it IS, then that is clearly the strongest effect. Combat-focussed Demons/Elementals are not able to challenge stronger parahumans in combat - but you could get a good amount of them, they're disposable, and not every parahuman is that good in combat.
The real strength of a Sorcerer is clearly their versatility. The above is just core-book spells, there are more with other effects. Most capes are stuck with just one trick, albeit some get very versatile ones and some are not so limited. Even a mortal Sorcerer would have a whole bunch of different tricks, all comparable to a low-tier parahuman power.
But that doesn't make the Sorcerer a good front-line fighter. With Invulnerable Skin of Bronze, Wood Dragons Claw and/or The Burning Name, they'd be tough enough to take on most human-level physical threats (and at some range, with The Burning Name). But they'd be quickly taken down by Glory Girl, Hookwolf, Bitchs dogs and wouldn't be invulnerable to guns, never mind the really strong parahumans.
No, their real value is in having a whole bag of tricks.
Your team needs transportation? You can call up flight in under a minute. Untraceable calls? Need a specialized power or tinker-tech - you have that too, and just that power can justify inclusion in a team. Cursing someone to vomit up maggots whenever they try to communicate about a topic may be messy - but it's often preferable to killing them, and can even be a nice in-team security measure.
Most teams would keep a Sorcerer as a support member, away from the front lines. Think Panacea or Othala - or Tattletale, if she had been allowed to do so.
If the Sorcerer does get forced into fighting - by their team, their shard (if they have one), circumstances or the authors desire - then they'd be best off using Invulnerable Skin of Bronze, getting up on a Cirrus Skiff, and then using Mists of Eventide to non-lethally take down people, or Flight of the Brilliant Raptor/Death of Obisidian Butterflies to take down tough opponents. From the air, where they mostly have to worry about accurate ranged attacks and flying capes.
But if they're stuck without that, due to surprise or some other effects? Sorcery shouldn't be something you can call up instantly, on a whim. In 3E there are lots of ways to get one spell off in just a single action, but that's difficult, especially for mortals, and limited to maybe once per day or even month. Your Sorcerer would be in trouble - and that's perfectly fine. If they have non-spell things (such as The Burning Name) they can use that, otherwise - well, having a weakness is fine for a character and story.
Speaking of Divine Bureaucracy - sadly the writing is currently mostly stalled for a whole bunch of reasons, but my co-authors chapters are doing an exploration of a Sorceress in Worm (Lisa, to be specific). We're mostly using the 3E system for inspiration, but really aren't sticking to the actual rules too closely and made up some sorcerous initiation merits/control spell effects to make it more interesting.