Snow EQ Team Help VGC Team Building

https://pokepast.es/a6073db1cf4cc5b9

This is my team, I always try to avoid using meta teams in games in general (so that's primarily why Galarian Slowking is here), but I have a couple flaws with the team I have come up with:

1. I can't get the Delphoxite because I lost my violet cartridge and I don't have ZA
2. I learned that all levitate pokemon are immune to any and all terrain effects (even buffs)

So I can't achieve my psyspam / heat wave spam / earthquake dreams... but I wouldn't mind some help on creating a team similar to my original vision. I mainly picked mega delphox because I wanted another powerful attacker to spam earthquake beside, and I really like the rest acrobatics Gliscor thing I have going. Weavile is here because it benefits from snow along with being an underrated fake out user (and it being one of my favorite pokemon), Mamoswine is here to be another EQ user where gliscor can't fit in, I think for what I have it's pretty central to the team. I also have sylveon on the team because I like it along with it being a generally good pick (fairy is really good and its probably the most meta pokemon I have on the team)

Rankings of how badly I don't want these pokemon to change:

1. Gliscor: Core member, was mainly paired with Delphox but we know how that worked out
2. Slowking: Another core member, I just generally kinda wanna do stuff with snow & psychic terrain if possible
3. Mamoswine: For any EQ users that benefit from snow, Mamoswine is likely key (my only thing is that switching it for Baxcalibur is definitely on the table if the need arises)
4. Weavile: benefits a lot from snow, exceptional fake out user, and I just like it
5. Sylveon: It doesn't really fit in with my team, but I do like it, and it does provide coverage that I don't have. maybe could switch it for Alolan Ninetales?
6. Delphox: yk why

I still want to keep the similar core idea (EQ spam + snow + psychic terrain?), but I don't know what I should do, or even what mega I use?