Im seeing a few request to remove MP cost from TBN lately and i have to say that's not easy to do, first of all bcs TBN is tied to the Dark arts proc wich have a gauge tied to it (useless gauge all being said) so thats means rework the whole proc mechanic or delete it but at the same time they can't bcs thet need to keep Dark arts name somehow on the jobs bcs is a signature skill on the job identity across the various FF games at the same time they will delete the literally only mechanic the job has and rework it means they have to actually put some brain cells on design the job even for that thing and i doubt they are going to get in to that at all, in other word it's a corner im pretty sure they aren't willing to work on it.

For self healing bring back Sole survivor, during his duration (10s) DRK get a heal of idk, 100p per GCD hit and heal the job with a cure of 700p when sole survivor fades off, 100p x5 + 700p when the effect fades off 1200p selfhealing every 60s aviable when you want, meh idk why i even think on it when i know it's never going to happen, boring evening don't mind me.