That is a really good idea! I try to do the Gauntlet without dupes, but also for other situations it would be great e.g. to see the talis effects when you have selected a character!
What was the problem with those 2 levels for you? I am about to clear AA and I can't remember the levels from tier C. Was it also only warriors and mages? Because this is also the case to clear AA. 6 fights to do. I have skill sharded 2 Eddies of each class, so I will need to decide which 2 Eds I will shard in addition. This also means for you, that you will need 3 Warriors and 3 Magus Eds anyway and therefore you could shard one now and still clear tier C? Maybe the community can help with team ideas...