Featherclaw
for more attack rating. Having it that low will require more attacking (higher mana depletion), so try to get as much as you can. I know mana is an issue in Teganze and the Treewarden isn't great for farming there. Swapping jewelry for rares with orbed mana regeneration will help some. Switching to wolf would make farming faster and most of the gear for tree works fine on wolf. Also, make sure you only have Thorn Strike at 1 point to keep the skill cost as low as possible.