Keep the adds under control, avoid the mess of aoe and you should be fine. The fights so long and thus accidents are bound to happen. From a healer perspective it's a very very hard healer fight unless the adds are off of you. FPS doesn't make it any better.
What's your feat tree looking like, I'm thinking I may have skipped out on some things that I should have gotten. Mostly I ignored some feats that were based off of my weapon damage. I'm finding it rather difficult to hit everyone with the HoT's without healing word (Because of how often you can cast) because these pugs…
If you're sitting in the enclave, load into the grand emporium or the blades (pvp) room. Any small map really, I had the same issue and once I noticed I never DC when I'm in a small map that's how I avoid it. Hope this helps.
I agree aggro does seem to be a huge issue as of late. Most of where I was coming from wasn't based on epic dungeons. Now that I'm 60 and have a decent amount of T1 gear I'm starting to notice how much it would really help to have a 12 sec HoT. I'm curious though, you made no mention of healing word in you're rotation.…