Targeting Flutter again, the #1 use mon is probably the most helpful to pick at. For one, I don't really like Power Gem being a 1st slash in on the 4th move on the 1st set. It's pretty niche, really. Not bad use given the frequency of this being used itself, but not 1st slash on a 1st set material imo. Hex is going down in use, but w/ ghold also going down, I'd say t wave Flutter should run hex,not Shadow Ball, maybe an oo menion for Shadow there, or idk. Ground tera, these days, is about as big as fire and water put together(just slightly less,) so I'd say a mention for it all over is warranted, probably fits most sets cause mir.
Uh LO Chi-Yu is a miniscule .6%, under even the random .8% lum(and no, idk at all.) I'd fully remove the mention for it in the 2nd set, at this time. Maybe the 3rd too, idk.
EDIT: hopefully that helps. I wanted to try to help, but anyone can scroll through the data LOL. The mons I use aren't always even ranked, much less w/ finished analyses, so it can be hard to give ideas based off experience. Um, gonna repeat that Scorching Sands Terapagos is great, probably better than Earth Power. I like Earth Power, but 30% burns>10% SpD drop easy. The 20 BP difference can be minor if you're gonna use the sig move most of the time..,but there is no data showing for Sands, so idk. Just thought I'd share an idea about something I use, rather than going off the data alone. Hopefully it becomes a thing, but if not oh well.