What, use Magic Transfer? That seems like a waste of turns. 3 mp to three other people with a huge delay? That's a piddly amount with a lot of drawback and uses a precious frontrow slot; meanwhile, if Meiling subs it, her attack costs are cut by a third or even by half depending on move (as well as any turns she switches someone or whatever is gain), if someone dies she gets a big chunk back (which she'll likely be present for given she's often out), and sometimes she'll get free casts. Casting Magic Circuit would be okay since it's a net gain, I guess; if anything, it'd probably just be a use for the possible turn(s) before Byakuren throws the superbuff on her or it's worn down too much to warrant spending mp attacking.
I don't really find Magic Transfer to be worth the effort it takes to cast, but magician's other stuff can be fairly nice in certain situations. Meiling doesn't really need anything from a subclass, so if what I need the most is for her to stop running out of MP and having to retreat to the back, it works wonders on her cheap moves. <3 (Regardless of the fact that I think all the high-mp-regen support-capable characters suited for Magician are better off in other subclasses or roles)
Yeah, Kogasa got some atk. I think her def wasn't as high before the change, either, same for Momiji (damn those stats are nice, but endgame the other tanks just have too much utility use to outcompete). Tank Kogasa is an amusing, if somewhat silly build for trying to enable Parsee or otherwise taking advantage of Sheer Force and her... surprisingly tank-friendly passive skills like Easygoing and Heart of Perseverance.
edit:Okay, Magic Circuit-ing Meiling with a magician doesn't sound so bad, actually. :T I could just throw it on Hina or something since she's regularly switched in and her Hexer subclass isn't honestly all that important, albeit nice. I might do that. Maybe. I mean, she could pop one on Byakuren while she's at it. And maybe cast Transfer on the turn right before she switches out. GDI (Also, no, Byakuren doesn't copy magic circuit along with buffs.) Otherwise I guess it could go on Reimu but that's pretty clunky. (Man, it's weird to think that I rarely even -use- Reimu. Eirin's overhealing and Meiling's surprisingly powerful Healer skill when atk-built sort of cover it. Maybe I should dump her for someone else. Although I might just reserve it for "plus disk character slot" since I'm already postgame... plus I might need her eventually. :T)
Eirin subbed as Healer is insane, by the way. Why am I even equipping megaspheres when she heals for more than four times the tanky people's max hp? Byakuren, Eirin, and Hina sort of trivialize the matters of buffs, debuffs, and hp.
edit:DOIN' IT, REPLACING REIMU WITH OFFENSE-BUILD SORCEROR MINORIKO B)