I’ve played 20+ levels of wizard, most of them as Battle Wizard, trying to make her work.
The only good thing about her is that you don’t need to take damage to vent if you’re willing to wait a little bit, i.e. BW becomes worthless once you hit 20. The teleport is insanely hard to aim in situations where you truly need it, the fire may as well be cosmetic, the cooldown is astoundingly high for such a finnicky skill, the increased charge time hardly functions (it only seemed to visibly affect conflag in all my test runs), the talents are almost univerally garbage with exception of the one that makes Tranquility work faster.
I like playing non-meta weird stuff and Unchained isn’t really my thing, but playing Battle Wizard just makes me feel like a V1 character. I may as well not have talents, a passive or an active.