I use 4 buttons, FGHJ, and they go like this:

F: Totem of wrath, magma x3
H: Mana stream x4
G: Earthbind, tremor x4
J: Grounding x4

In PVP, I usually hit: G, J, F, H. In that order.. most devstating thing would be fear so I want those down first, then grounding totems so I just get arcane spammed for 10k instant (among other things), then the other two if I get time.

I have some variations by holding shift+f, shift+g, etc. that have other buffs, resist totems, etc.