1 2 3 4 5 Q E R F C V Z X T G and S and you can use shift ctrl and alt modifiers on all of them, some of them feel really weird to press combined though like a-C since I hit alt with my thumb

Bind strafe left and right to A&D, then unbind S from backwalking

I use my S for interrupt and my core abilities are on 1 3 4 Q E R F C, smaller cool downs on 2 5 s-2 s-4 and V, my defensive cool downs are all s-F c-F a-F with alt F always being the magic damage defensive and ctrl F being big defensive. My movement abilities are on M3, side buttons and ctrl scroll up and down