@Warlord5386 even I'm stuck there and, correct me if I'm wrong, won't sinister keep healing from all ægon's hits rendering him useless?
Hyperion will be your best option , if you have Heimdall then you can have even more options. Ghost and Aegon can do it too.
Awakened ghost can one shot him
Guys I just defeated him using rank 5 fury and units man!!