Quote Originally Posted by 'Crayonbox',index.php?page=Thread&postID=91028#pos t91028
I have my 5 shamans target a different one and hit chain heal. For the most part my shamans tend to be full or nearly full when getting aoed for semi low to med damage. For any other aoe damage, chain heal casts too slowly. self target + lesser healing wave is king for those.
If you drop a man, one of your guys will just heal himself (Providing you made sure to the macro tells it to) won't he? Unless you put a pretty long list of targets (IE Try to heal A, then B, then C, then D). I personally just self heal everyone with chain heal if I want to get a lot of healing flying out. When you self heal it will still proc to the next two targets. It goes in order by who's taken the most damage. I have heard that if you have everyone on top of themselves sometimes heals won't proc around. Can't say I can confirm or deny this (It's on some thread), I don't notice it if it happens that way.

From http://www.wowwiki.com/Chain_Heal
This target is healed for the advertised amount (plus 5/7 = 71.4% bonus from +heal gear). The spell then jumps to the friendly target within 5 yards with the largest current health deficit, and heals it for 50% of the amount from the first one. After that, the spell jumps a second time (but never back to the first target) to a third target, which is healed for 25% of the initial amount.
I've never had a problem with it not sending enough heals to everyone. In bad situations I prefer a self heal with lesser healing wave though, or 5 lower ranked to one person, since I tend to only heal when I'm getting hit, -a lot- and chain heal takes a while.

I do also have a hard coded chain heal that goes to specific characters bound, but I only use that for showing off, never in combat. I don't see the point.