I'm sorry, but if 3.x MT Warrior used Vengeance and/or Raw Intuition for stacks, there was clearly something very wrong with him...
Fair enough, although this looks very far-stretched, considering that WAR will rather use gauge for Unchained and Upheaval if is MT single target and SC spam if tanking group.
I agree that DRK and PLD now bring some utility as OT, but they bring it also as MT. WAR bring nothing as OT, so in the end PLD/DRK or PLD/PLD becomes much better option.