Ideas about my team

I have been building a new team, with my last ones being a success. With legends za out, I thought I'd say goodbye to the BEST era of competetive battling. This team was a scraped team, and I figured I could build something good out of it. I'm running 3 big hitters, with settups for each of them, and ones that help the rest of the team. I have:
Greninga, a HUGE hitter, trained specially and physically.
Politoed, a support for greninja.
Corviknight, a defensive tailwind setter.
Shiftry, with wind rider, and physically trained leaf blade with tailwind, is a big threat.

Grimsnarl, with light screen and reflect, can do good damage, and great speed
Finally, a "simple" guts flame orb facade ursaluna, with play rough to lower attack, and with grimsnarl"s spirit break, can lower special and physical arttack, and is hard to take out, one shotting basically anything.
Let me know what you think. It has been faring pretty good so far, and I like it. Some of the pokemon aren't good competetively, and while i'm not trying to be the meta, I'm not trying to be completely different.