Who is a better 5* to rank 3 for AW defense?

I pulled 5* Dormammu today from the alliance gift gifting rank rewards. Willing to save up T4CC mystics for defense but need some input.

Comments

Unstoppable colossus is a pain in a ass to fight in aw.And he bleed immunity so he be great as a boss in aw.

Dormammu needs to be duped for strong defence.

Unstoppable collosus is great with high md on a variety of nodes especially no stun

I'm wondering when they'll make the 6 star Unstoppable Collosus available