4* troubles, please help
I have played for a while but took a year long break in 2018. I'm back now and have come to realize... I'm very bad. I was not as smart when I used to play and ranked up a 4* super. IM, Hulkbuster, and Cyclops. When I came back I got a 4* Dormamu, duped Void, and Carnage. I need to know which heros to replace with my new ones in my team. My team is Cyclops, Hulkbuster, Superior Iron Man, 5* Loki, and 5* Red Hulk. Who should I replace when my Dormamu, Void, and Carnage are ranked up?