Just 2 mages, one computer 2 monitors. The first time - when I took these stats, I just used AE. I'd gather the mobs, freeze, run in a circle and AE, and I never died. The 2nd round I used imp blizzard, and I'm able to pull much more mobs, but if something goes wrong its death for sure. I died 3-4 times perfecting the technique, but for the payout I think blizzard is more efficient. I don't think you could blizzard without 2 monitors since it takes a mouse click on the other window for the 2nd character to act. But you could imp blizzard 2x with your frost mage then AE with both, that works well too.

My first death was by using keyclone to hotkey blink both mages together, and that breaks follow, which meant death in that case, because I naturally walked forward to get char2 to face the right way to bliz. So now I gather, let them hit me a sec or 2 with frost armor on, freeze them, and blink, char2 follows and I'm casting imp bliz on the frost mage. Meanwhile I move the mouse to screen 2 and turn char2 around and bliz. Takes a bit to make it habit, but once you do, you can gather as many mobs as will follow.