He is still weaksauce though? Just not bottom of the barrel anymore...
Like sure he can fight small-time vampires easy peasy and probably slaughter his ways through soldiers.
But that is after he got training in monster hunting, got the memories of a legendary demon hunter implanted into his head and has been in hell for who knows how many years.
And he still sucks at magic defenses and while he is good at slaughtering mooks that is not very impressive overall. And that is after a series of lucky and fortunate events that happened just in the right way so as to work out..
I mean, are you seriously saying that Taziel planned out everything, knew that years down the line he would have a powerful Kitsune girlfriend, connections to all sorts of people and have grown to kinda acceptable power levels. Then get stuck in hell for who knows how long to get into "decently powerful" territory? i.e. a decent option, but not really any kind of heavy hitter.
I am honest, this nonsense of Taziel mind-twisting Hiver-SI has always been nonsense even beyond the obvious waste of time it is. It goes against the basics of what we know of Fallen, that they want either full on allies or puppets on strings. We have never seen any example of them doing anything like faking someone's entire life, mostly because that would have been really convenient when Lash was dealing with Harry. As mentioned by
@me.me.here, the only example we have of someone who has been brainwashed is someone full on jailed inside their mind and tortured. Like seriously, the only examle I have heard of Lash tricking Harry was some case of her faking being a librarian, and he specifically could look through her illusions with some effort.
Hell, we actually have an example of a Fallen Host laying down their coin and surrendering of their own free will! If the Fallen can so easily twist people's perceptions of reality, that would never happen because the Denarian hosts would only hear death threats.
Edit: More than that, it goes against the narrative, writing countless updates developing characters only to go lolnope at the end would be incredibly disatisfying and leave so many questions hanging that would need to be answered. Is Aiko real? Has their relationship happened? Was hell real? Did Saint actually experience his training with the crew, did he ever even meet Buffy. Is he even in Buffy-verse or is thsi just an elaborate TV show for him to live through? Its nonsense.
I mean yeah, if we conclude that she has some irrational out-of our knowledge or nature related reasons to stick with the random guy who has nothing useful and is super paranoid of her then we can conclude that it makes sense... We may as well conclude that she is the one friendly angel who just wants to be friends with everyone, give hugs to little children and make the ouchy's go away.
I mean, we are literally just making shit up in this case, stuff we have no idea about. I mean seriously, Taz is how many billion years old? The idea that she has never picked up an innocent person whom she could befriend, play the pure Fallen Angel with and satisfy any urges for being seen as the good guy who just wants to heal people with is ridiculous. Even assuming that a ancient being like that would even have such urges in the first place.
About that nature of spreading sicknesses... is that stuff from the main series? Because that sounds like a.) something we would have heared of for sure since it is a big deal, but I have seen no mention of that from any discussion on the Dresden Files series b.) go against the fundamental reason why they even fell in the first place, because they wanted the free will to do whatever they want, whether that be good or evil or whatever else.
Angels getting to use free will was the entire point of them falling. If they are stuck following some kind of nature ingrained into them, there was literally no point to them falling at all.