Humm. Ill give that a try, Im at work and not able to test till later. I am wondering though maybe im doing it backwards. I read up on a few other posts useing /click and dot's. Maybe change it to the following.

/castsequence lifebloom ,, ,, ,, ,, ,, ,, ,, ,, (2presses per second, give it an extra second)
/dps macro

Thus in theory the lifebloom will get cast every 16 presses of the button. Rest of the time the dps macro is going. Im thinking this will work, but how to get it to roll lifeblooms across 4 druids at a 2s interval.
This might work.
lifebloom ,, ,, ,, ,, ,, ,, ,, ,,
,, ,,Lifebloom ,, ,, ,, ,, ,, ,,
,, ,, ,, ,,Lifebloom ,, ,, ,, ,,
,, ,, ,, ,, ,, ,,Lifebloom ,, ,,


Basicaly a druid will fire off a lifebloom every 4 presses of the key... But im not sure how it will work with starfire and wrath. If its casting the spell and im still hitting the button, I can see this just bunching up all the lifeblooms after the first 3.5 second cast. Im sure they will all do it ok, but instead of a nice smooth lifebloom roll going, it will be weaksauce HOT and bunch blooming for mass overhealing instead of a nice bloom every 2 seconds or so. I dont expect it to be perfect but a more evenly spaced heals.