I do believe that Thm will 'spawn'...get it :-) a job-type that will heal and aid the party through self-sacrifice and-or dark magic abilities. However, I just can't see Necromancer being the outcome...Dark knight is just the more logical choice as a job option that fits the lore and basic skills you want from necromancer....minus the summoning of the dead.

Necromancer just seems like an epic boss we'd need to defeat...maybe a Thm gone bad. You're correct we need another party healing healing role and a 'sacrifice' healer does fit the bill...but that just seems to play more into Dark Knight than a SE necro. Redmage, if introduced might also carry some of the abilities you are hoping for.


Lastly, even if SE gave us necromancer, the idea you put forth in your OP while cool is way too over-powered. The necro you desire is really only suited to a single player game.