IDK, it's hard to do anything with healer LB because of how 'all or nothing' the LB3 is. Nothing can remotely come close to the power level of 'you res everyone instantly'. So my trash suggestions would be:

I'd make LB1 heal it's current 20%, restore 2000mp to healers/casters (not other jobs, we don't need DRKs cheesing parses with LB padding) and additionally a 300p regen for 15s (for comparison, it'd be equal to 'Regen but on everyone', or 2x Medica 2)

I'd make LB2 heal it's current 50%, restore 5000mp to healer/caster, and additionally a 500p regen for 15 sec

And I'd reduce the animation locks on these LBs to be a lot shorter, such that 'saving the run' is more doable. Nothing like raising everyone in time for a mechanic, only to have their corpses aim said mechanic at you because neither you nor them are able to move. If they wanted to be extra interesting, they could have only WHM and AST have the regen, and SCH/SGE get a shield equivalent, but I feel like that steps onto the Tank LB's shoes a bit potentially