I don't know what the normal is, but here it goes.
I did a live streaming of everything, the kill is at 37m40s. Nevermind the terrible quality, and the fact that we are speaking portuguese. It's the first time I did a stream and I still need to find the right quality.
http://en.twitch.tv/andredex/b/303014116
Phase 1
Positioning - We had tanks and melee standing in purple marker, Black in the red marker, Gardenal in the green marker and Keyra in the blue marker. When a twilight barrage (little purple balls) is going to hit the ship, me and Sparthy help green and blue. When is going to hit red, Deaf or Jhzamjin go there. The ranged are free to dps the dragons. No one should be taking care of the yellow marker, cause we aimed for 3/4 of the ship, and it was enough.
Dreadblades/Slayers - I got Slayers in first and third waves, Sparthy got Dreadblades in first and third waves, we swap them in the second wave.
Dragons - The locks got them.
Sapper - With our positioning, we just need to do some aoe until he appears, then Broopen stay behind purple marker, Death Grip the sapper, and kill him alone, no one else should dps the sapper, unless you are cleaving.
Cooldowns - Try to make some raid cooldown assignments for each Onslaught, like Divine Guardian, Ralying Cry, Barrier, Aura Mastery and so on.
After 8 attempts we got phase 1, it's less chaotic if you have designated things to kill and positions to stand in.
Phase 2
Positioning - Locks on Goriona, Blackhorn tanked in the middle, healers spreaded.
Shockwave - This is really difficult to avoid if you are a ranged. The tip is to stay 10+ yards from the boss to avoid disrupting roar, but get close to him right before he uses Shockwave. This way is ridiculous, you can avoid all of them.
Vengeance - Since he hits like a fuckin truck on the end of the fight, we lusted at around 50-60% left on his health, when Goriona was already gone. The tank rotation was Sparthy (1), Dex (2), Sparthy (3) and Dex (4), and he died. In the second, third and fourth "phase", we rotated cooldowns to survive,
Phase 2 took us 4 or 5 attempts breaking our skulls on the walls, then we got the right way to handle Shockwave and Vengeance. With 2 or 3 attempts we killed him.
I will be always streaming on that link, if any you are bored and want to watch, you are welcome.