Quote Originally Posted by TotallyNotEvil View Post
The raw numbers are way too powerful for that level. Your ability to blenderize anything in sight, and be essentially untouchable to anyone whom might dent your honking HP past your fat DR, and your Plant immunities help to get you through any spells that get past your boosted Con and Wis.
Blenderize? Untouchable? You don't have the natural attacks or base attack to blenderize anything. It's possible to get nice damage if you add incredibly front-loaded classes (Whirling Frenzy Spirit Lion Totem barbarian), but that--which is the single most powerful melee option for a treant--still doesn't take you past a solid tier 4. You'd be right up there with the other barbarian überchargers, making up for your lack of maneuvers/Dungeoncrasher/interesting abilities with brute strength.