Midrange Lock : Curve out, John Silver on 6 to force their best lore engine Reckless , then quest John next turn to repeat
I've seen that some players are using them in casual Derevi decks, and this seems like the perfect home for Keeper of the Nine Gales, thanks to its untap effect
Helm of the Host on Muldrotha is something that is easy in Solitarie, and nearly impossible in a real game with real opponents.
just be warned that its possible the lands gets reprinted, maybe as soon as Commander Legends 2
If blue gets involved as a primary or secondary color, the profile of the deck tends to shift more towards tempo using more interaction cards like Aether Spike and ground blockers like Emissary of Soulfire to slow down opponents while your flyers do the damage
All that being said, it's got a high ceiling and a low floor, and is probably over costed