Just looking for some advice to become the best healer I can. Love playing Warrior Priest / Salvation. I know this is a fairly straight forward spec and playstyle but as a newish 40 CR I want to be sure I am doing it right

Current Spec: RoR.builders - Warrior Priest
I have all Armor Tali's, Tome of Repose and Epic Weapon "Valor" and I am full Annihilator (almost have conq complete but waiting for RR50 to swap to keep +1 Salv)
I have been following this post as general playstyle:
viewtopic.php?f=8&t=8562&hilit=warrior+priest+guide
I am wondering when I have the RR if I should drop willpower tactic and use divine warding for the bubble on direct heal using Martyr's Blessing.
I know that WP is quite survivable comparatively speaking but I also know I seem to be targeted and killed alot



Edit: Almost forgot....Trivial Blows or stick with Futile Strikes at this RR/gear level.......
Thank you in advance for any advice!