I rerolled prot last night with like 90% Avoidance to test out the new prot spec, my gear, etc, etc.

No, I'm not at the 490 so the bosses could still crit (459).

I ran into a very serious problem though.  I wasn't really getting hit, but it appeared sanctuary wasn't giving me the mana back that it should have.  Was this because the single-target mobs were only hitting 'oh-so-often'?

After trying the first set of six with Cons only in my first rotation of threat-gen, then holding it I was still always nearly OOM at the end of the fight.

So with the next six, I attempted dropping Consecration completely and focusing on blowing my CDs on the rest of my spells as soon as they came up.  Not nearly as bad as the first six, but still having mana issues.  I was OOM by the time the boss spawned and told the party to just wait.

On the final six, I stopped using Holy Shield.  Completely.  BoS appeared to grant more, and even with the occacionaly crit from the final boss, I still never dropped below about 6k (half-life) from the Priest's healing.  Since I was being healed, I was at nearly full mana the entire time.  I used Cons at a constant and started wielding Martyr as opposed to Vengeance and/or Wisdom.

I'd like to know if anyone else has experienced similar issues with being 'to geared' since this latest patch.  Due to the massive dodge/def rating I had for a relatively low-gear requirement instance, I wasn't taking the damage I needed to get the healz I needed for mana (thus threat-gen).  Yet when I stopped using Holy Shield (our bread/butter), my threat-gen and mana availability were maxed.

Opinions?