At the moment, I would rather leave a skill slot blank for ANY character rather than take vampirism. The lack of food is just too much of a debuff, considering that the amount of regeneration lifesteal (2+ 40% of HP REGEN? WHAT?) provides is nowhere near enough to compensate for such a vital part of the game. Not to mention, lifesteal can be encrusted on weapons. The second level provides around 4 or so hp per corpse, which is tiny compared to the amount of health food gives you. The two (One unless you put 3 points in the tree) necro damage resist is almost useless, and certainly does not compensate for inability to eat. Sparkly doesn't always stun, psychic vampire is useless, as you have to be in melee, and only useful if you're a caster (Might work with the warlock skill tree, but I'd need to try that, and as lifesteal scales with HP REGEN if you want it to be decent you need to get those, not caster skill trees.) and the last skill is only good for getting an achievement. This is an entire skill tree in which, you come out worse for getting, as every other skill tree actually has useful things. The only way I can see this tree being viable is if you do something drastic, like removing the "Cannot eat food or regenerate health over time" debuff, or massively increasing the scaling of lifesteal (Possibly making it scale with base damage, or damage in general? It scales 2 + 100%/60%/40% of hp regen from easy to hard, I think, at the moment, which is useless) and the initial effectiveness of the healing effect, as even on the easier difficulties it is sheer luck if you manage to reach level 2. TL;DR Read it, lazy, it's only approximately 300 words. EDIT: Actually, if anyone has any viable (For Going Rogue Difficulty) Builds that involve vampirism, and thinks I'm wrong about it being useless, tell me and I'll try them out. EDIT2: Thanks, I'll try out some of these. Still silly that it should require very specific builds, IMHO.