mouse 4, mouse 5, mouse 6, mouse 7, mousewheel click, mousewheel up, mousewheel down, T, Y, H, B, Z, S, E
then take all the same buttons and put "alt" infront of them, then add alt+space, 1, 2, 3, 4, 5 ,6
i use RDFG as movement so i have more buttons around my left hand to bind, just a preference.
Lots of ways to do it, but yeah, Marauders really do take into use 95% of the skills at our disposal, the sooner you get rid of the default keybindings the better.
sry for off topic, as someone already said, the roatation changes depending on your build and your situation