My idea for the WHM kit

[Semirhage]

re-raise mechanic and pure healing is pretty much what defined ff whm in the series,so what would you offer then instead?

And buffing. And debuffing. And powerful damage spells. "WHM is a pure healer" is an identity that does not work in this game, and never has. Because it's synonymous with "WHM is the obvious worst choice of the three healers" unless the other two are in a nonviable state.