10 man differences...
1. There is one of each of the types of healing buffs instead of two.
2. Only one person needs to soak Hour of Twilight which will generally be the current tank with aggro. Even if you have DPS with cooldowns you could mix into the rotation this creates unnecessary complexity and it's just easier for the tank to take it consistently.
3. Fading Light is applied to the current tank and one DPS instead of two DPS. This is cast twice between each Hour of Twilight after the first. This means if you have the current tank soak Hour of Twilight, it will always be the same tank, whichever tank starts first. Your tank however should be fine simply alternating which major cooldowns they use because of the reduced cooldown duration and increased effective duration.
That's pretty much it for differences in 10 man. As far as strategy is concerned its very similar, everyone pile up for easier AoE healing and burn the hell out of the boss.
There is one minor mistake in this guide...
The wipe occurs at 6 minutes and 5 seconds because Twilight Eruption is a 5 second cast that starts at the 6 minute mark. A minor detail but don't freak out if you see your first kill at just above 6 minutes.
"In anything, if you want to go from just a beginner to a pro, you need a montage." /w TankSpot WTB Montage for Raiders.