Hmm, I'm surprised his steal skill is actually properly usable. I had expected it would only work on under-leveled people, but he can use it on monsters to steal skills that strong, so doesn't really seem limited; even if it was only because the monster couldn't resist being dead, thats still any enemy you can defeat that you can take the power from. Another possibility I was thinking of was that maybe he also couldn't level stolen skills, and potentially had to eat duplicates to level them, but even if that comes true, if hes stealing from monsters with the skills starting at that level, shouldn't really be a problem.