Alright so here's the idea, a fallen Devil ketch has been located cloaked above a huge dust giants land-tank. Strange... so you enter the land tank and the cabal are no where to be seen later you come across a group of cabal legionaries and phalanxes with a commander in the middle called Primus ta'uol(only a tier 2 enemy). you kill him and you move on and eventually reach the command bridge fighting enemies on the way where you see a fallen leader communicating to a cabal general, named Valus Je'tal(pronounced Jay-taul)over a holographic communicator. But the bridge is locked down so you have to secure 3 points(like the salvage mod in crucible only surrounded by cabal and 3X). you must to hold all 3 points for 5 minutes at once while cabal are spawning and trying to take the points back. Then the bridge opens up and the communication between the Valas and the fallen are cut. then you get your first set of raid loot. the cabal seems confused on what happened. you go back to the entrance of the bridge and confront him.the room consists of a long table with cabal storage crates for cover. the fight starts up and Valus Je'tal whips out two huge phalanx shields. essentially what you have to do for this boss is deal heavy damage to one of his shields to make him stumble and have an opening to hit him. Or what you could do is have 3-4 players distract him and the other 2-3 players sneak around to his back and hit his arms with half as much damage and make him stumble too. All this is happening with cabal constantly coming out of doors to add a little more pressure on the team. The Valus also has projection rifles on his back for offense. once you beat him you receive your second set of loot. Then a huge door on the opposite side of where you entered opens and you find a fallen lift guarded by 3 reaver captains, a few vandals, and dregs. All of the fallen are from house of devils. you fight through them and the lift activates. you and your team get on the lift up to the ketch but as you almost reach the ketch's interior a alarm goes off and a split second later the lift shuts down. you and your team are now falling through an elevator shaft with pipes sticking out of the walls. The idea is to land on the bigger pipes and navigate through a maze of pipes randomly shooting plasma damaging players. after you get through the maze you enter a large open area with dim lights and all you can see is glowing eyes presumably fallen littering the walls. the lights flash on and all the fallen leap down and over the intercom you can hear a fallen speaking in a vicious tone. your ghost tries to translate it but all he can make out is "Kill" and "Guardians". That's all you need to hear the huge firefight starts and the fallen keep coming and coming and eventually cabal start coming too. your ghost exclaims "What are cabal doing on a fallen ketch?!". at some point in the immense firefight a few pikes and heavy pikes come in with vandals driving them. That just shows you these guys aren't messing around. Then after the pikes dregs on interceptors come in and start blasting the crap out of your fire team. this should last quite a while. after the waves and waves of enemies you receive you 3rd cache of raid loot. finally you enter the throne room a large fallen is sitting on a throne with skulls on spikes on it. the fallen stands up and says in English. "Ah the guardians, I've been waiting for your arrival...". after he says this he proclaims,"I am Kosriks, The lost Devil Kell". as he says this he takes out a new weapon, a fallen plasma cannon, (concept art: http://www.videogamesartwork.com/games/destiny/fallen-assault-rifle, I did not make this amazing rifle) and the fight starts up. In the room there are piles of crates for cover and 2 smaller rooms off to the side of the larger one. As the fight starts up two rather large shanks emerge from behind the throne. That's all for now come back later maybe ill have an idea then but for now I'm at a loss let me know if anyone has any ideas for this fight.