Tried messing with some of the different valla talents last night. If you go auto attack you need to go manticore/searing attacks. Tried caltrops and really its just a useless talent. You can definitely notice the increase in her auto attack power, if I get to push a wave in I can take down 2/3 of the structures in a wall down with manticore/searing attacks before the towers can clear the wave. And you noticeably clear camps quicker, I tried vampiric assault and really its such little heal I'd be left with about the same amount of hp after taking a camp had I just taken manticore.
Think I'll dick around with some hatred builds next time, if you take punishment at 1 and repeating arrow at 7, q>w>e>q would pretty much give you full stacks if you took tempered by disclipine at 13, might give her the sustain she needs to take advantage of auto attacks.