Make a small change that would break a class completely.

[Kiroh]

This idea is taken from WoW, i think its druid healer or shamans not sure. But you had a passive when you died you could Self rez.

Whm trait, when you die gives the ability to self rez with no weakness full Hp and Mp. 10 min CD (WoW one was 30mins)

WHM in FFXI had a spell called Reraise that allowed you to do exactly that.

(1.0 XIV also had a Raise 3 that allowed you to raise a person with no weakness.)