I'd avoid it completely, the only ability you can really macro is Dragon-sight and even that isn't optimal, Drg has a lot of double weaving going on so i would recommend optimizing your hot-bar to make space for it, I play DRG with 1 and a half bars perfectly fine but i have to put my self heals on macros which is considered fine (I'm Rank 8 self healing lol) your self heals are the only trim-able abilities.