First off the obligatory "you are missing an enchant please fix it my eyes hurt" speech :)
As retsu said, defensive cd's are really valuable here, esp because the raid should be spread out to avoid dropping windbombs in melee. Unfortunately you are missing out on the goodness that is disc and their ability to SS ever single windbomb. That said, I would talent holy avenger here. Around 10sec before RoB is off cd start pooling holy power to 5, and position yourself so you can hit as much of the raid as possible with LoD. Also make sure holy shock is off cd when RoB starts. When rain starts, pop holy avenger, LoD, HS, LoD, HR/tower of radiance DL or flash of light, LoD, HS, LoD. This is the highest output aoe rotation you have. You could also move into melee to cs for the extra holy power, but then you risk dropping a windbomb in melee if you don't get out quickly enough after RoB ends.
If some members of your raid are taking higher damage then others for whatever reason, feel free to use EF on them instead of LoD.
Beyond your own personal output, I would recommend establishing a cd rotation. Something like tranq on first, HTT 2nd, holy avenger 3rd, personal cd's 4th etc. Should help make the damage manageable.
Edited by Corvala on 2/8/2013 12:30 PM PST