My cleric is level 10, and I finally have the Gianthold adventure pack (it was on sale! woot). But I'm not sure when to start doing quests out there. 11? 12? I remember the xp out there being awesome, but I want to make sure I'm pulling my own weight. I think 12 would be the latest I would wait, since I will have the heal spell and and +40% potency for level 6 spells.
So... level 11 or 12? Or even now? I think 10 is pushing it though.