Personally I've gotten more comms healing and DPSing out of sch then cnj or AST. Might be because of the nature of how sch does most of its DPS, compared to the others. As someone who mains tanks I look to give comms to the healer 1st and if one is able to DPS while keeping me upright, even more likely to give it to them. Even if they might make me nervous those 1st few pulls as I find out how well they balance heals/damage.