I'm real new to this too but this is the set-up i use atm with 1 Pal and 4 Priests. I use Keyclone and I have my followers with my main set as focus and all my macros with mostly this format:

#showtooltip renew
/assist focus
/cast renew

this will cast 4 renews on who ever my main has targeted when i push the V key

I have another one that is the same for my flash heal that is the same, but i also have a macro that makes toon 1 heal toon 2 heal toon 3 heal toon 4 heal toon 5 heal toon 1, so that if i'm getting beat on and i'm getting pushbace it makes sure that the guy geting beat on gets an non interupted heal. (i used this for my 5 priest setup) that one is:

#showtooltip flash heal
/cast [target=ToonName] flash heal

Just change the toon name for each macro and set them all to the same key.

I hope this was helpfull. I'm new here but i love the site so far. good luck.