Great guide. There's one tactic I haven't seen listed here that's worked really well in groups with my mind controller. I use Mass Hypnosis on the group we want to pull from, which puts them to sleep and is aggro-free, so we don't have to worry about automatically drawing aggro from the ones not hit by the sleep. After that, the person doing the pulling can pull whomever they want, and at worst the pull will just drag along the few mobs that didn't get put to sleep. Pull them far away enough and you don't have to worry about drawing aggro from the slept group when they wake up.
This is somewhat specific to mind controllers (Earth Controllers get Salt Crystals, a PBAoE, but that's a little more dangerous since they actually have to run into the group to set it off; I also don't know if it draws aggro or not), but it's extremely effective and something to keep in mind for those groups where they're too big and dense to pull a small enough group to be safe.
