It'd be a good idea to start working on your CB team now. Frozen Banshee easily replaces Athel on your team. Fayne can also replace Drexthar.

Also I wouldn't worry too much about finishing the Doom Tower now. It'd be better for you to work on your CB and dungeon teams first, you got some of the core pieces for DT anyway. Good luck.

Ok good info :) Thanks . Another question of mine is i can fuse razhin but it just seems so much resources i mean he is like 2 x 6* while i can as you said make fayne and frozen banshee to 6 * at the same cost . How much is he worth? Anyway i m glad yoou helped me !!

I was actually gonna ask you about your Rhazin progress. Rhazin is worth it. Hits really hard, good Giant Slayer champ, and maybe with a little set up can help keep up Def Down/Weaken with Fayne 100% of the time. You can try stuff out but imo he takes Tomb Lord's slot. 

Alright . Thanks again :) FrBanshee will be first then maybe rhazin i guess :) 

definitely drop athel as suggested, and work on CB. fb, rhazin and fayne all solid.  rhazin will be most helpful of 3 in doom tower