Fight your way through the Cabal command ship.
Go through the now open window beyond you.
Go over to the left when you exit the window and make your way into the next room.
There area few more Legionaries with the Incendior.
Make your way over to the right along the corridor. Blocking your way forward is Pashk, the Searing Will. With the additional Incendior, and Legionaries, it is not an easy fight. Keep your distance and use Solar Weapons
Fight carefully, keeping your distance and fight using the walls and pillars to your advantage for cover. Quickly eliminate the others to make the fight easier.
Defeat all of them and head on past the turret and wall in front of you. This will put you against Brann, the Unbent Blade.
Go on down the ramp to reach the next portion of the ship. On each level on the way down, you will find 2 Psions and a Incendior. Be sure to attack the Incendior's tank to get an explosion to thin out the foes on the sides.
Make your way down the levels to the lowest one. Head through the gate in front of you.
Just on the other side is a Incendior. Defeat them and continue forward into the next room.
Like the other Major Centurions on this ship, he is protected by a Solar Shield. Use the sections and walls to block the fire and heal when needed.
This leads to a massive turbine room with 3 sections that you need to reach. Doing this is not very simple because of the rotating power generator.