Ever been in a exp group/behest and feel like... the tanks not doing anything and letting the mobs just run around hitting/killing everyone in the group?
I think, wardrume/warmonger and especially taunt/provoke should have a stamina cost reduction (or maybe even 0).
Thinking besides tanks wanting to watch you all die horribly, don't use provoke/taunt is because it uses like 50% the stamina bar almost, when you just want to tank 1-2 mobs without aoe aggroing everything else in the area.
You see most tanks just taunt at the start and thats about it, just once per monster... no stamina really to do it later, if it comes off them, they just tend to let the monster run around and kill people.
Its almost the same for NM's because they are using all their stamina to survive and pretty much hoping between you hitting for 15-30 and them spamming abilities it never comes off them.