/SCH doesn't really change how we work in a group setting, other than the inability to blink/stoneskin "on the run" (which also interferes with resting, should Earthen Ward be done).
That said, Sublimation can cover upwards of 200mp which would reverse the need to rest as frequently.
All said, /sch is a great sub, solo, low man, group, end game, or messing around, should you not need anything specific from other subs. (erase, teleports, utsu, sneak attack, meditate.. the list goes on.)