It probably just seems tough the way I described it but its fairly easy.

Going by memory I think shift-1 is bar 1, and shift-2 is bar 2, and I put my wrath macros on 1, and my starfire macros on 2, then just switch between them when Jamba tells me to. I put my shift-1 and shift-2 keybinds on my mouse to make it really easy.