If you have specced fire, then you will start to see that fireball damage becomes not too much lower than Pyroblast, so you end up just firing off two fireballs then a fire blast from each toon to drop anything up to 3 levels higher than you. I found that a frost bolt followed by arcane missiles (and fireblast to finish if they are still alive) worked really well (even though I was specced fire, so I imagine it is much harder hitting if you are specced for them) and it also helps that the arcane missiles keep you facing your target at all times. Two things to note; the first is that channelling arcane missiles drops follow so be sure to press your follow key afterwards in drawn out fights. The second was that I was rarely if ever having to turn or move in any direction other than backwards and forwards.

I leveled two mages and rarely did I get hit and I hardly ever had to cast frost nova, but if I did I'd back them straight up.

- Yamio
When you open up on a new target they will run directly at you. When they are almost at you, hit frost nova and see if they made it in range. If they did, press your backup key (which is mapped for both your toons) just for long enough to get you to a comfortable distance to pull off another fireball. If they didn't make it to you, then start casting fireball straight away. If they survive that followed by another fire blast, you hit your second frost nova and do these steps again. /castsequence on frost nova is brilliant for multiboxers because you can keep the target immobilised for a very long time, without wasting time running too far away to begin your next double, triple, 4 or 5x cast.

I've now levelled 2 sets of dual box fire mages, and once you get the hang of them I'm sure you'll have an absolute blast like I do. :thumbsup: