Instead of alt-tabbing, you could try playing in windowed mode, and have one screen in the top-left corner and the other bottom-right. There will be some overlapping, but you'll be able to see most of both screens at any given time, and instead of requiring alt+tab to switch, its just a fast click to the window. Thats how I 3 boxed and it worked great for me. The only macros I had were /follow, /assist+/cast(+/petattack), nothing advanced.