Something like Bongo's, that allows you to map multiple keys to the same slot, is really useful for this.

For example, I have the 1 hotkey bound to fireball/scorch rotation on my mages, lightning bolt on my shaman and lolsmite on my priest. My priest and shaman have heal macros bound to 3 different keys (for small, big and group heals) but since my mages can't heal I use Bongo to map these key combos to the 1 hotkey on my mages, then when I have to cast heals my mages still dps at the same time....just makes it much easier.