Purifier Is by far better than sent in basically every way now. Only putting this up as some fights need two tank healers and two puri's don't stack.
spec-
http://rift.magelo.com/en/soultree#qg-g/pGaGyFkGGa8/nfThe last 15 points can vary depending on the person. I use warden for Healing Floor and inquis for the crit chance and 4% Spell Power. Having these two abilities makes it very easy for me to solo heal most if not all bosses of a 5 man (there are some that need a bard or chloro but these are few and far between). otherwise feel free to put those 15 points where ever you feel they would be most useful
BUFFS:
Heroic Resolve
Wrathful Exuberance (keep on main tank)
Light of Redemption (keep on tank in 5 mans or Off Tank in 10/20 mans)
Marked by the Light (keep it up all the time it will passively heal the group for you without much effort)
This build is all about knowing when to use what CD and when to use it to it's highest potential.
For the most part this build consists of healing the tank and party with four main abilities:
Subtle Invocation- fast low-moderate HP heal, default non-tank heal or for topping of a tank quickly
Healing Invocation- medium moderate-high HP heal, default tank heal
Crucial Invocation- Faster high HP heal, perfect of large spikes of tank damage
Healing Breath- Instant low-moderate HP heal that splashes onto 2 near by party members, great or healing melee at while healing the tank as well or hitting 2-3 ranged in 1 GCD.
For the most part you will want to use HI and SI for your main heals switching between the two based on the situation. You will want to save HB for spot healing party or raid members. Crucial Invoc is self explanatory, use it for period of massive tank damage.