For me on rogues:
- Clever: Distract then sap while the shammies are mounted, giggle as all the others come back to retireve the incapactiated one. Wait a few seconds, then do the same again. When in combat, blind one of the shammies to reduce the number vs. Save cloak of skills till the last minute, then vanish, run away, bandage up, rinse and repeat. (I've got better at dealing with this recently, but in the early days a good rogue could keep my whole group busy for 3 or 4 minutes).
- Dumb: Attack the lead when all shammies are in the middle of a totem farm and in formation. Waste cloak of lolz too early, keep attacking the main despite heals from the other 3/4. Ignore the fact that 3 or 4 of your allies are dying to CL or LBs. Once all the enemies are down, shock then LB and die miserably.