Haven't killed it yet, but we're starting ranged at the back of the boat on the left set of stairs. You can prepot, LB, fireball the first drake, then start running and get 2 scorches off on the first drake. By this point you're at the center of the ship and the 2nd drake is flying over, and you can LB it and get a scorch off. Less damage to Goriona, more damage to the first set of drakes.

This is what I do, and I think it mostly agrees with the complex rotation on Landsoul's spreadsheet.

As soon as execute phase starts, spam it to build executioner. If CS is available, use it. Anytime CS is available, I follow it up with 3x execute to fill every global with CS debuff up, followed by alternating BT and execute until CS comes off CD or I proc 4pc. Generally I like to line up DW to cover two CS uptimes. If creche is not procced, stack recklessness with DW and execute spam during CS, otherwise save reck for the next time I can execute spam during CS. Inner rage on CD as well, preferably stacked with CS and other CDs. There are several fights in which you generate enough rage from dmg done and taken to incorporate HS during execute phase.

During non-CS I tend to use slam procs if BT is down unless i'm rage capping for the free dmg which also allows me to build a bit of rage for HS/follow up with a more powerful execute.

Execute hits so much harder that I see no reason to use any other ability while CS is up on the boss, even if you delay a potential VoD proc. Since as SMF both BT and execute benefit from the 20% dmg increase, that really doesn't change anything, but as far as whether to use BT or just execute spam, it would depend on rage generation. I would definitely use BT with the 4-pc.

Never drop Swift RJ for Nature's Cure.

1) You cripple your HPS output when not using cooldowns. Cutting Rejuv spamming down by 0.5s per cast is very important when you're blanketing huge raid damage. It's also very important when properly utilising Jaws of Defeat.

2) You shouldn't be dispelling. Other classes are able to dispel with much more efficiency than we are due to talents/Glyphs.

3) If you have to pick up magic dispel then consider my current talent build: Talents & Glyphs - Game - World of Warcraft
I pick up dispel due to heroic spine of deathwing, if our main dispeller dies or is gripped at a bad time he calls it out and i step in to help.

Edit: I wanted to add that this thread is becoming a bit too much of a "This is my raid situation, what should I do?" instead of a conversation about healing as a resto druid in patch 4.3. The posts on 4t12 not interacting with full health people with Searing Plasma on heroic spine for example (including logs and conclusion) are good, the posts on your individual healing layouts are going to be completely skipped over by majority of readers. Lets try keep it informative.

You can sacrifice mastery for haste till ~1750. It's still dps increase on single target fight.