Thanks for the replies guys. I managed to get through last night but I have to say I'm not liking all the disease clouds and exploding mobs in Scholo. On the second attempt I had reset the instance and did not kill Rattlegore so perhaps that's why I was getting pulls of 5-8 mobs. In the end I read Thinus's advice and just healed through, while side-stepping the clouds. Seemed to work ok - perhaps I was panicking a bit given that it was a new instance. I wiped at the doctor, but as I had completed the Warlock epic mount quest, I don't think I'll be rushing back to Scholo for a level or two...