I keep hearing this about bene being a death sentence, and i Know it was for the most part in 11 cus it actually had a built in threat modifier, but in 14 it seems to only generate as much hate as an equal amount of curing would. I'm main tank and whm is more my pet project, but I've never seen a whm pull using bene nor have I done so myself. Perhaps in exp situations, but for endgame (speed runs, moogle, ifrit) I've never seen it happen. Even in Chim fight (which seems to me to be the only time whms ever pull threat, and the new changes to emnity materia should alleviate that even for groups whose tanks don't have HDL).

That said, use bene more without fear tbh. As to the topic at hand, a hi mp cost, long recast isntant cure would be really nice I think. Perhaps as an ability that sacrifices hp (there aren't currently abilites that use up mp are there?) would work as well. Just something we can do in the space of a single "ability crouch."