Yes BLM can in theory ress an infinite number of times in umbral, but it needs to sacrifice resources to combat movements in order to do it which might be a problem later, not to mention the need of beign in umbral AND the target loss, if you ppl shun mana shift from BLM because these very reasons by saying that we are the actually worst users of that despite the infinite MP I don't see why it shouldn't be the same thing here.
This is would be a balanced situation because you would have the option but it wouldn't come without setbacks for you.
That's why I say it works and since it's simple it shouldn't take much time off them.
I understand ppl wanting things to be complex so that they can have depths, but I'll tell the best mehcanics in the game are those that works and sometimes keep it simple makes them works the best.
Also frankly the only reason SMN has access to raise is because SCH had to have it while for RDM it's because it's a staple white magic that they had access to and they wanted to recreate the feeling of it, I wouldn't burn my hand for them giving ress to casters because they like the idea since honestly they had no thought on the raise repercussion when they reduced R3 MP cost at all (especially since they didn't foresee the effect on dissipation when they reduced summon MP cost)
Tbh I'm still partly sure ppl are not thinking about raise in the right way and not seeing the repercussions it has on gameplay, especially how objectively broken dualcast raise can be, hopefully they'll realize the problem unless we want instant wipe mechanics to creep even to autoattacks
