By the looks of things you've got Thing, Medusa (recently buffed), Gladiator (buffed) and Spidey Supreme as 6* as well. Chee'ilth is really good too - she's worth practising with. You've got some decent ascended 5* champions as well to support - a 5* ascended Herc and Onslaught will help you out too.
Depending on your skill level, either go now or run Arena for a few days to build up some more units (for revives). Make sure you're doing the Apothecary too. MCOCNoob has some really good YouTube guides, others are available too.
Good luck! If you can hit Paragon before the 10 in 10 starts, your account will get a real boost.
I wish my alt account had champs like this. I'm at 7.4.3 running champs with 10-12k pi. Main team has been Warlock, CMM, Black Cat, Toad, and Gorr (at least he's a 7 star). I don't have willpower unlocked either. Hasn't been difficult, but I'd gladly trade resources for faster fights.
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Depending on your skill level, either go now or run Arena for a few days to build up some more units (for revives). Make sure you're doing the Apothecary too. MCOCNoob has some really good YouTube guides, others are available too.
Good luck! If you can hit Paragon before the 10 in 10 starts, your account will get a real boost.