This... Personally whilst i understand Blessed Life has a use it PVE speccing 1 point in BL and sacrificing a core healing talent point could be wasting 1 TP on a RNG talent, that is unless you invest 2 points in BL and 1 in TOR..
All in all unless a guild assigned a Paladin to spec BL and stand in the fire so to speak or heal from the front, i personally don't think this talent has a place in PVE, sure some of the high end raids in 85 there may be a point doing so, but it would take some persuading on your part to let your group leader to let you spec that way.