Full Disclosure, I did use revives. But only because I messed up. But this team can solo every single fight in the Gauntlet without any crazy gameplay. Boosts are advised.

R1 Cheeilth. Rest are R3
Path 1
Doom - Standard Onslaught fight. Practice it until you get a comfortable solo.
Terrax - Sinister solo. You can finish this fight 100% health. After parrying, dash back and hold heavy so that you don't take any degen damage.
Vision - Spider Ham solo. Pretty standard ham fight.
MODOK - Deathless Thanos solo. Use sp1, intercept with Counterpunch charges. These will not get autoblocked. Throw a heavy after this. You can also keep hitting MODOK even if he autoblocks, mostly he will drop the block.
Spam - Solo with Onslaught. Use sp1s as soon as you get it. Heavy counter his sp1. That's pretty much it. By the time the fight is over, there will be above 100 neuroshocks.
Path 2
Wolverine X - Onslaught solo. Again, try to counter his sp1 with a heavy and try to keep the degens.
Thing - Pretty long Cheeilth fight. Her grit passive helps with the unstoppable but he rarely gets it. Mine was R1 so it took above 400 hits
Korg - Can be soloed with Sinister. I died when he had around 8% health. After a point, Korg won't be able to shrug debuffs. So you can safely parry and get rid of the rock stacks. Timing the sp1 will be slightly tricky.
Dragon man - Solo with Ham. After getting 25 porker chargers, throw sp3 and push DragonMan to his sp3 with 10 nonsense charges. I tanked 2 sp3s and he was dead.
BPCW - This is the fight I wish Cheeilth was ranked. It was bloody long but manageable. Just keep spamming sp1 for grit. Used 3 revives. Should've been 1 and frankly, a solo .
Path 3
Nightcrawler - Standard Deathless Thanos fight.
Gwen - Again, standard Thanos fight. Don't be afraid to throw a heavy and place the Armour Shattered. The damage back is minimal.
Domino - Again, Thanos. Heal to full, use sp1 and then sp2s. She dies quick. His increased Ability Accuracy means very less crit fail triggers.
Mojo - Spam solo. Be very aggressive, block his specials , don't dex them.
iBom - Thanos fight . Standard. 2 sp1 and then spam sp2.
Path 4
Apoc - Thanos fight.
Sasquatch - Spam fight. Very easy.
Killmonger - I used Onslaught (solo). Cheeilth works too if she's awakened. With Onslaught just keep heavying and try to get hits in to build neuroshocks .
Void - Cheeilth can solo. She keeps getting cleanse so it's pretty much a very vanilla fight. I used sinister and managed to take off half his health even with all the debuffs on me.
Nick - Onslaught fight. Nothing major. I saved the sp3 for after Nick goes to his second life.
Thanos - In the last phase, use spam. Two sp3s and he was dead from all the porker poppers(sp3 ones.)