That's an amazing roster as per your progression level!I'd suggest you to focus on the following champs for becoming tb:1. Shang Chi2. Prof X3. CGR4. Venom5. Human Torch6. Mr NegativeCheers and all the best
Chavez makes phase 3 of the GM easy because she can reverse his power gain with a couple heavies and you won't have to dodge any sp1s that phase.
That roster is stacked. CGR would be my focus, and the others previously mentioned.
Top picks:CGR: no need for awakeningHuman Torch: no need for awakeningShang Chi: no need for awakeningShuri: no need for awakeningVenom: no need for awakeningMasacre: no need for awakeningSunspot: no need for awakeningChavez : high sig preferableValkyrie: high sig preferableCheck out Lagacy list:https://docs.google.com/spreadsheets/d/1G5-lA6s-rEYUitamed9DKErXmfH2V6yURc3fCk3kgzY/edit#gid=0My advice is to watch MCOC NOOB guide because he usually mentions which champs will works on each path:https://www.youtube.com/@MCOCNOOB