I opened the dorr and entered a few steps. The lizards came one by one, I killed them with meteorstrike - saw on the minimap where the dragon rider was and avoided him. Went into the south part of the room and waited for the lizards again. Then when Rak-Sheen was solo - I used Elemental Hail. this is a more patient approach = enemies come to me, not I to them.
Kiya
