My method for doing the dreaded lyceum with 4xshammies and a pally was making a macro that did 3x Fire nova totems and 1x stoneclaw totem in rotation, so a different shammy would use his stoneclaw each pull to conserve cooldowns, while single targeting the ranged guys (there were 1 or 2 in each group). Then move into the space the group you just killed occupied, drink for a few seconds, and do the next group. This seemed to work pretty well (after a lot of attempts getting the rythm down ), just watch out for pats.

Make sure not to leave any totems behind, as a group will repop and agro them and come running at you later on.

This was at level 54 or 55 I think, not sure exactly.