Uhm, well right off the bat you're gimping yourself massively by not using any of your L90 talents... using one of those alone should increased your HPS by 5-10% at no effort what so ever (light's hammer was 7.7% of my healing done last week).
Another big one is, you're apparently in melee attacking the mobs with crusader strike? You should move on to generating HP with radiance rather than crusader strike, which is time spent doing no healing at all.
Though if you ask me, the biggest thing holding you back (ignoring the massive amount of avoidable damage your raid is taking from sources like whirling blade and corrosive resin, though all that should be doing for your position on the meters is help you out; the damage your tanks are taking is also extremely high - one of your two tanks takes more than our one tank does when solo tanking the fight; are you guys dispelling the damage buff?) is that you guys are going with 3 healers rather than just 2 (you should also 1 tank instead of 2 tank, if you ask me, especially considering that you guys are apparently wiping to the enrage).
Not a lot I can see wrong with what you're doing; except for the obviously massive error of not using your L90 talent, there aren't that many things I think you're doing wrong. I would recommend you HR instead of CS for HP, that you try to avoid using LoD as much as possible, that you cast less holy light, that you try to use divine shield more, etc; minor things. You guys are obviously not failing because of the lack of healing, but because of several pretty major flaws in the execution of the fight itself.
What I do on wind lord is just spam radiance on melee and EF the ranged:
http://www.worldoflogs.com/reports/d...?s=8334&e=8766
Hopefully, today I get to 1 heal the fight for meter whoring!