5-boxing alone, 4-boxing with the wife - Classes?

[Nisch]

I do 5 shamans and she plays a frost mage, so I just sit a shaman out... We just blizz kite everything while I pew pew.

The problem with that is that we're RAF'ed and if I spread out the levels too far, then I can't get the bonus on the one I sit out.

So I figured it'd just be easier to do 2 different groups, plus it would break up the monotony.