@Ibux The Imp has only like 1k HP and 1k armor, and it even only gets increased health at half value from Stamina buffs. However, I still think that it might be worth it in an "emergency tank" situation when there's a well-geared healer available and the tank leaves while there's still some boss left to be taken out (and all the other members of the party can't fight in melee). Super niche but the Imp just takes too much damage to be used reliably due to healer mana, even with Improved Health Funnel.
I was going to make an alt priest, for mind control lava fun, but I couldn't decide on Dwarf or Night Elf. With the Dwarf you have the bonuses of Fear Ward and being a Dwarf. For Night Elf you have Shadowmeld, which is great for getting those mind controls off before they see you. But with this I think I will be choosing a Night Elf.