Best cross class abilities for a Warrior?

[Kitru]

what do you mean by even if you have to cancel berserk early?

When a fight is about to get phase pushed while I have Berserk up with 5 secs or so on it, I'll turn off early so that when I have to engage (or reengage, like when the boss disappears and there's 5 secs or so of no target), the Pacification will be over (since I never expect or ask for an Esuna).