I haven't raid healed in 10m in a while. My guild does 25m. I would recommend the following.
1) Keep earth shield up on tanks, and riptide up on 3 people at all times.
2) Spamming chain lightning isn't going to give you high numbers, but use it when needed.
3) Plop down healing rain on cooldown if people are still taking damage. Heck, I throw it down anyways.
4) I use HW a lot to top people off, with a Healing Surge in there once in a while depending on how much damage people have.
Your stats are not terrible. I would suggest reforging crit to haste though. Your spirit is fine. You really don't have much more than I do. I find its a comfortable level, but everyone is different. Some run with less. If you are comfortable with how your stats are, that's perfectly fine. Haste and mastery depends on preference. Whether you want your heals to be faster, or hit harder. I would go with a bit more haste though, since we don't really need crit.
The only thing I would suggest about your spec is to get Telluric Currents.
04/02/2012 03:22 PMI do not have TC do to the more I dps the less time I spend healing. If I have the mana to cast an LB I have the mana to heal. So again, I am confused on this statement.
Posted by Gläwäsh
There are times, on some fights, when there is no healing needed. I use TC all the freaking time. The conclusion is that when some healers are completely OOM, I have half mana or more, and I am able to heal when they are not. Trust me, I abuse that talent. There is no way I would EVER go without it, especially if you ever make it to heroic modes.
But after glancing at your comments from advice people have given you, it seems you are set in your ways. It baffles me that you are asking for help, yet you don't seem to want to take anyone's advice. i think I am finished here.