Hey, I leveled up like this, it seems to be a fine art of managing a short list of thing to not kill yourself and others.
This guide here really helped me a lot, I would read this through and see if you have anymore questions.
http://wiki.project1999.com/The_Tech...E_Kiting_Guide
-Pick a style that works for you and just practice it to death (Strafing, Selos circles)
-Always double check your hotkeys before starting, IE rights songs in right gems, you haven't changed your /cast numbers.
-Instruments are important to change out if you can manage it since later on they double your damage on the dots.
-Missing a dot on the mobs is ok, you're trying to kill a large number at once, not in a short time. It's more or less a battle of attrition.
-I've pulled up to 80 mobs per pull, but also down to 20, depending on who's in the zone and how the lag is that day since sometimes there's just weird spikes. I used to play a Wizard on live and 4 mobs per bar of mana was great. We don't really use mana though so really whatever you end up being comfortable with is fine.
Some technical things you can adjust to help the lag bursts, hide Dot damage, set FPS to 30, when you finish stacking your mobs turn your Far clip plane distance down all the way ( you can set hotkeys to do this ). Turn off spell effects.
This wound up being a whack of info to toss in, hopefully it's not to disorganized to make sense. Hopefully it helps a bit.