As it would turn out, the Crushbone are not the masters of Crushbone Keep, nor of their own destiny. The D'Vinnian Court, followers of Emperor D'Vinn, took advantage of the stupidity and short-lives of orcs to remove Emperor Crush from power and install themselves as rulers of the keep and the Crushbone Empire.
Notes[]
This is a larger heroic dungeon with several nameds who have a chance to drop legendary and fabled items. You will need to kill watchful sentries to unlock most doors. This will lead you deeper into the dungeon.
Using Escape in The D'Vinnian Throne will place you at the entrance to the zone but still inside the instance.
After you speak to her, she'll disappear, and two mobs will spawn. Kill them.
Now you need to kill watchful sentries for the keys. There is one in each room of the D'Vinnian Throne Room Instance. As you kill a sentry, they will drop a key which enables you to open another door. Sentries are 31 ^^^.
Eventually going through the rooms (Necromatic Chamber, Gladiator Training Hall, and a few others) you will reach Ograf the Deft level 33 ^^^ at ( -60, -9, -180 ) Copy/waypoint -60, -9, -180. Once you kill him, the zone timer will be set, and you will not be able to enter for 18 hours, so be sure you want to spend the time in the zone before you kill him. He will also drop a key.
Go down the last hall on the left from where you killed Ograf, open the door. The last 3 mobs are General V'Narr (3 arrows up), Lieutenant B'Oreth (1 arrow up) and Lieutenant D'Bryth (1 arrow up) They are level 35 and linked. Kill them.
Kill yet ANOTHER watchful sentry for another key ( 58, -9, -93 ) Copy/waypoint 58, -9, -93
Now you can find D'Vinn and Lady D'Kush. ( 53, -9, -157 ) Copy/waypoint 53, -9, -157. D'Vinn will spawn 4 guardians, level 35 (1 arrow up) Kill them.
After a short respite, Vindicator Crush will pop, level 35 (3 arrows up). Kill him. Once you kill him, D'Vinn and D'Kush converse, then disappear.