For some classes like disc priest they pretty much need things like dbm and big wigs because they're a preemptive healer that needs 15-20 sec of prep and lot of the mechanics are random. Compared to this game where almost nothing is random, preemptive healers don't need timers and such because it's always the same. Like I don't need cactbot or whatever in this game but In wow if I didn't have big wigs it would be impossible to play disc priest.