At this risk of appearing to brag, I'd like to offer a helpful hint for Clerics in Phase 5 of The Shroud.
In almost every Shroud run I'm in, I'm seeing as many as 3 clerics blowing through their entire mana bar in a minute or so trying to heal the group in Phase 5. The melees then need to backoff while Clerics refill which to me is an annoying waste of time.
I have a technique that has worked well for me and thought I'd share it here.
1) Position Pit Fiend near the east side of the altar area.
2) Mass heal and select one tank.
3) Continuously run back and forth over the right corner of the Southeast pool, so you get a double mana hit.
4) Have everything turned on. I use Quicken, Empower Healing, Maximize and Empower.
5) When the group health gets to about 60% or so, cast a single Mass Cure Moderate Wounds. It will typically heal the group to 100%.
6) Continue working the pool non-stop with mass cure mods thrown in as needed. If the group is taking a lot of dmg then throw an occassional Mass Cure Light.
I'd say 9 of 10 times, I'm able to solo heal through completion and have mana left. Certainly a rare example, but just the other day, I solo healed and when the Pit Fiend died, I was at 100% mana. Meaning, I was able to heal and keep my mana bar topped off by working the pool.
Just a helpful hint from your Uncle Ren.