Basically what I do...

1.>Stoneskin
2.>Let Tank drop to 55-65% (Cure 1 if tank takes a hit which brings him down to 30%)
3.>Out of CS Divine Seal Regen
4.>Stoneskin
5.>CS DPS (Quickcast Stoneskin if QC is available and Stoneskin is down)
Repeat from step 2.