tank with least buttons for 4 mans

[Galgarion]

The actual answer here is DRK by far. Come on guys what are you even trying by saying PLD and War instead? All a DRK has to do is literally just spam Unleash/Abyssal drain with some blood price to get mana back. That's it. At most at really high levels spam abyssal drain with the ocasional quietus worked in there.

You have to combo to regen mana, though. That's too many buttons, the whole system falls apart.