Something I discovered which I want to share with other RAID players is the amazing potential of Fenax in Clan Boss as a major damage dealer. Here you will see screenshots of him doing 37m damage on UNM Clan Boss which I did not know was possible by him.
I actually had my Fenax in a Savage set for various other content and never considered him for Clan Boss since it is so difficult to keep him alive.
But if you are running an unkillable Clan Boss team or a block damage team then he becomes very viable with some other correct settings allowing him to do massive damage.
Here are 4 screenshots:
(note: I discovered from this iAanG Gaming whose face you see in the first screenshot. He is a great RAID player and content creator so feel free to visit his YouTube channel)
Screenshot 1 - the Clan Boss results:
Here you can see the Myth Heiress team combination achieving 78.64m damage from which 36.9m was supplied by Fenax. A very impressive performance by Fenax.
Screenshot 2 - Fenax equipment:
Fenax is wearing a Retaliation set allowing him to counter-attack the Clan Boss for more A1 damage (A1 is the skill which does the highest damage in case of Fenax).
Screenshot 3 - Fenax masteries:
Here you should adapt Fenax's masteries depending if you are using block damage or unkillable to get a bonus when your health is full or below 50%.
The main purpose of the defense tree is again to counter-attack for more damage.
Screenshot 4 - Fenax stats:
These are his stats which are very impressive. Most players do not have such good equipment so adjust the damage expectation lower depending on how good or bad your equipment is.