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Message to User:
Don't hit enter after every sentence, use paragraph form.
Beacon is that good for this particular fight. Period. If you read between the lines of the previous posts, ^^
I did it with a resto shaman, and we downed saurfang somewhere around 60 bp on the second mark. (The shadow priest used his own his divine hymn, and a hybrid started helping on the second mark).
Sadly, no one recorded the run (our logs are on private anyway).
On ideal groups, we've downed him right after or before the second mark.
Your raid needs to push up the dps as much they can of course, because sustaining 2 marks at high bp is barely doable with 2 healers: Pre-poting and all kind of tricks dps have.
I'm not proficient here, but our dps prefer BL at the start, to get more damage on saurfang rather saving it for the healers at the end. This worked for us in 25 men as well.
Also, you need to reduce bp gains to the strict minimum. This include using Blessings of Protection early on a dotted target, and perfect tank switching.
It also helps if you get lucky with who gets the mark (you, with binding heal for example, or a hp-stacked melee with defensive cooldowns).
I'd advise sticking with discipline if you have the spec. In 10-man the damage is low enough to be fully absorbed by a shield and avoid bp.
I noticed you were using renew, GH, CH a lot.
My personal experience here is that you need to single heal quickly, so flash heal. Prayer of mending on cooldown since it's so good on this fight (2-T9 helps). Your shaman should handle most raid healing while you focus more on mark/tanks. Of course he will have to help you.
Not so sure about shamans, but a crit and LHW approach might be safer.
If your pally can keep alive the current tank and one mark (beacon), this would give you ample time to handle the second mark and extra damage on the raid and helping him during high bp.
If your shaman goes elemental, you'll have a knockback for the beasts by the way. But you'll miss replenishement unless your lock goes destro.
On a side notes, your holy talents are rather weird. You pick up improved healing and not empowered healing?
I'd suggest this if you want to stay holy in 10-man. Use the remaining two points in either surge of light, emp renew, or Body n Soul. You can also take the two points away from Healing Prayer.
If you really want improved healing, take the points from Healing Prayers. But with a feral druid and a resto shaman you have plenty mana cooldowns.
Glyph for GS, CoH, FH, renew depending on your preference. (for Saurfang, renew, GS, FH).
If you go disc in 10 man, take the divine fury and try using GH with power infusion on you for hard-healing times. Also don't forget renew is still better than FH to heal a raidmember who will not take more damage, especialy with BT up.
Well, hope it helps.