What abaout an unkillable team? https://deadwoodjedi.com/speed-tunes/the-dark-knight-aka-warcrusher/

You don't have Skullcrusher as stun target, at least I can't see him in your roster, wich will lower your damage output, as the counter attacks are missing. But from the goal of staying unkillable, Torturehelm should work as well as stun target.

I think you may be able to use a Tower + Brogni setup, whereby Tower does block damage for the first two attacks, and then Brogni's shield gets you through the stun damage.

You'll want to use something like this: https://deadwoodjedi.com/speed-tunes/ninja-hellcat-unkillable/

• Instead of Helicath, you use Tower. 
• Instead of Frozen Banshee, you use Brogni (to block the stun and put up the shield to help cover the damage)
• Ninja stays on the team
• For the last spot, you run Fayne