Personally I have about 300ms and I find that I'm able to dodge about 70% of the aoes but I do still get hit outside of the aoe circles once in a while.. I used to think it was a skill issue but at this point there have been several times I've been completely out of the circles by a long shot and still get hit. I think this should be a top priority for SE, I read that the servers are only polling for movement every 300ms.. that doesn't seem like a lot but when you have a 300ms average latency already that adds up quick. Most other mmorpgs poll every 50-100ms and I can definitely notice the difference.