That's just the top 100 in japanese name order, not in actual results order. Results are avaiable a bit after the end of the event and Anemone will be in top 10.

Like I said, Bloss works well on single path missions (like Corbett fight). If you're aiming to do the entire mission with only her team, you don't need to fill the 3 others with 6*. Actually, it's possible to build a full 6* team around Bloss just at the start (assuming you manage to get Bloss):
- Bloss
- Cactus (free starter 6*)
- Ume (free starter 6*)
- Sakura (free starter 6*)
- Spring Star School (buyable right now)
Obviously not the perfect team but still works for most of the game.

Even the team in the video is almost easy to build. Bloss is Bloss, Corbett will be available soon, Horse Chestnut is old and available with 6* tickets/300 R-medals and Pincushion is a promoted 5* (5* are easy to get and she will drop from gacha or world exploration sooner or later). The only real problem is Thunberg Spirea (Christmas).
I don't really know why Thunberg Spirea (Christmas) is here. I guess Spring Star (School) is a possible option here.

Anyway, I like this composition. I guess I'll look for Pincushion now.