Originally Posted by Yoshi-P
Yoshida: For development, such as with Bahamut's Coils, the development team assumes what the item level should be for general equipment on players when they clear a raid. They sum up the basic DPS for four DPS and tanks at that assumed item level and cut that by about 10-15% for the minimum clear DPS.
Once again, healer DPS was not included in the development team's calculation as it was for other jobs, so you should just think of healer DPS as a last way to get your overall party's DPS up to where it needs to be.