A pally in good gear can solo Skeram. It's easier just to solo it to avoid the mind control than contend with a your mind controlled slave. Emphasis on good gear. Need full t9 and some t10 helps.

Others on here have said they just burn Skeram down with their team balls out but not really sure how they manage that.

For the Twin emps I'm told you use dots to keep them on the right target, Like SOV or Moonfire whatever you got in retrospect to their immunities. When they switch they'll beeline to whomever has the dot on them.

There was a guy on here who said he solo'd AQ40 with his team every week. He didn't go into much details except the ones I posted above and his armory had like 30 Cthun kills so the proof was there.