As title states, I'm looking for tips on maximizing burst DPS on T5 conflags for both healer jobs.

I'm currently a SCH, and I'm doing something like:

-Pop cleric stanc
-Precast Shadowflare
-Use Selene's Spell Speed skill (we have two BLM under foe req)
-Instant cast Bio
-Spam Ruin and/or Ruin II

Is there anything else I can be doing to squeeze more dps out?

Also would like to see what WHM should be doing. I don't have any experience with it, but I'd like to give our WHM tips on DPS as well.

Thanks in advance.