Personally I would remove raise from all casters but put it as a role skill that they can use but with an insane cd like 600+ secs and still has the long cast time, so you literally only have it for "one" use per pull in savage content and you have to really know when to use it because you can waste it if you move during the cast.

Then just focus on tuning the casters around the dmg or utility they bring and not whether they can "save" a run which imo becomes less relevant as content gets older and ppl know what to do. Leave the rez to the healers.