for healing all of my guys, i created separate macros on my main healer for each of them and put them in order that they showed up on my main tanks screen (my main screen). i keybound them to F11 (main tank), f10, party2 on my main tanks screen, f9 for party 3 and so on.

this allows me to most of the time just spam a lesser or greater heal depending on how large the health deficit is on my tank, and i can hit the other buttons if anyone else needs a heal.

i have a key setup for the dps (that can heal) to heal themselves.

now that i have a druid i will just make a key for tranquility and bind the same key to chain heal on my shaman while my priest casts her group heal, that should be enough for any oh crap moments... that worked well for me.

i initially tried to have the heal spell keybound to the same one as my dps, but found that i really didn't need to get healed that much so it was a waste of mana

I am not sure how everyone else has their keybinds setup, but for me, keys 1-6 are for my paladin tank, and keys 7 thru = are for my dps. since all those keys were already in use, my healer uses the F7 thru F11 keys.

for singular buffs (such as heroism, which i want to control for boss fights) i keybound those to the numbers on the number pad.

each person is going to want different ways to do things...