Luvi is Trox and is doing just fine... nano pool is np (have 8.1K currently) with 11k HP self, ok I'm a little behind on int/psy, but can cast my best available SL heal with CI just the same as Soli at my level (206) ... but of course if you wanna cast things earlier/have an easier time of it, def go soli, I wouldn't bother with nanomage sadly, u need those extra HP
Anyway, go with what you think would be most fun to you
I love being trox doc, so far I've not regretted it one bit.... but I guess it's not for everyone.
Edit: btw, if u wanna support Cerberus, it's tanks we need more so than Docs I believe... consider rolling an Enf