Stuns, use adornments as necessary. Otherwise seems to be tank and spank.
Metalloid
Stifles. tank and spank with HOs. ( 276, 36, -688 ) Copy/waypoint 276, 36, -688
After I killed Katakir, Theya, and Metalloid, the transporter at ( 294, 36, -684 ) Copy/waypoint 294, 36, -684 activated.
Syadun
Stifles, engage him and then pull the watcher's weaves from the tops of the pillars to get rid of his stacks. Just DPS once they are dead. ( 44, 37, -662 ) Copy/waypoint 44, 37, -662
each of the a watcher's weave gives him 20% damage reduction
Syadun has a frontal elemental ability that can kill you quickly if you don't have the ability to cure it. Bring elemental cures.
Once he is dead, there is a teleport where he was standing that will take you to the last boss.
Shanrazad the Spared
Once engaged, it is wise to stand with your back to the rock, because he teleports you to the edge (or off the platform altogether.) Otherwise just burn him down.
His teleport also roots you, this is a curable trauma detriment. Plan accordingly if you don't want the fight to take all day.