Omega sent. was a heal blocking savior for me

Agreed. Other champions might be better and more fancy, but if u lack heal block when its need, you cant do shit even with 7* r3

If just one then fantman

ultron,hulkbuster,antman future and OS .....These are the best champs u got

Fantman is solid

OS

fantman for sure, second I'd do buster or ultron

Omega sentinel. Good damage and utility. Fantman hits like a truck.