You should use the fewest macros you can. You want fine control of what you do and when. The only macro I find truly useful with no drawbacks is the one provided above to cancel immunity when using hand of reckoning. Every other macro I can think of will be useful SOMETIMES and terrible the rest of the time because it wastes a cd of some kind. I keep one ready for targeting special mobs for hammer of justice (i.e. Twilight Sappers), but those two are about all.
"he doens't need healing, he doesn't need healing, he doesn't nee-WHAOSHIT!wtf was that man!". Please stop leaning on TDR. -Teng