I don’t think mew is too dominant for a ban. Almost all the top decks have around a 50/50 matchup against mew. I don’t think mew vmax should be banned. If anything where to be banned, it would be meloetta.
Your going to need to be doing a little more than 300 damage. Yes you could theoretically play inteleon, magma basic, flaffy and manaphy but I doubt you could get it to run consistently.
I really think everyone is underestimating charizard VSTAR. A 280 hp 2 prizer, doing that much damage. Plus the possible support with magma basin, melony, or some other energy acceleration that gets discovered.
Yeah, I don't see what deck this would good enough in to make it worth playing. The only reason would be some sort of Cheryl deck but we have seen with corvinight/bronzong and Inteleon vmax that it isn't that successful.
Possible cards I could think of are galarian zigzagoon, decidueye, altaria, and malamar. These sets are planned far in advance so there could be cards that where supposed to be playable but flopped.