Honestly, the tank Limit Break seems to fit this role. The healer Limit Break does as well.
They are made to survive oshit moments, they are our party oshit button (and it makes me sad when a dps pops the LB mid-fight without finishing the boss).

Paladin and White Mage have long "o shit" buttons too. Warrior and Scholar don't, because they aren't as simple as "push the button" (need wrath, combos, aether, multiples actions... nono, that doesn't work).


I think these will be adjusted soon, because they can be used as a strategy to bypass some fight mechanics, while they were probably meant to recover from mistakes done by players.