I first beat the Collector with 4* champs not as powerful as yours (Thor og, Magik, Quake, Guillotine and Black Widow).
Void isn't going to work - Collector has Tenacity.Likewise Annihilus.If your other champs are at a level comparable to your Domino, you should have a roster to take him; but this probably isn't it.Take a screenshot of Collector and his abilities; then quit and start again with a reworked team. Maybe someone like Heimdall, if you have him. Sparky is another popular choice.Before trying to take down the Collector , make sure you learn to play around with Bane; and let that do the heavy lifting for you.Watch Dorky Dave explain it all: https://youtu.be/UQ2bgs_hjEo
Stark Spider-Man is the #1 option for this fight. Domino can’t crit bleed because of tenacity, sentinel might work, not sure. Void will not work at all. Cosmic lizard, no idea. I never use him