Wow. Good lucking healing heroics with any of those builds. Those are pretty terribad, except maybe for PvP (this thread is for PvE builds btw)
http://www.wowhead.com/?talent=sxAzgMzhVuMxRtoZVf0x0h
Imp Conc Aura is for PvP, unless there is some huge wave of encounters which involve silence. I put those 1 of those 3 points into 1/5 BoK to appease Warriors in 5 mans, or when there is a Prot / Ret pally in the group that can fill in some of my standard blessings. The other 2 points went into Imp LoH which I've found to be pretty useful, and the reduced CD is nice.