Well, a 140BP STAB Fairy-type attack off of 125 base SpA is going to create a niche for anything that isn't utterly worthless in other respects.
I'm not sure what Floette-E's best set would be, though; its stat spread is kind of weird. I think the Defensive Calm Mind set sounds interesting? Maximize physical bulk so you can get a couple boosts in and start spamming Light of Ruin.
The big issue is that your HP stat isn't great, and if you use Floette-E as a wallbreaker - and that's something it could definitely pull off; brute force is not a problem here - you're going to kill yourself pretty quickly. That makes a Choice Specs set a lot less attractive.
Although, hell, that could be fucking terrifying with Wish support. Use it as a hit-and-run attacker; bring Floette in, Light of Ruin something, switch out, come back in once you're able to get a Wish in and kill something else.
Arcticblast: it's a Powersaves thing - here's Serebii's updaded dex entry
I'm not sure what Floette-E's best set would be, though; its stat spread is kind of weird. I think the Defensive Calm Mind set sounds interesting? Maximize physical bulk so you can get a couple boosts in and start spamming Light of Ruin.
The big issue is that your HP stat isn't great, and if you use Floette-E as a wallbreaker - and that's something it could definitely pull off; brute force is not a problem here - you're going to kill yourself pretty quickly. That makes a Choice Specs set a lot less attractive.
Although, hell, that could be fucking terrifying with Wish support. Use it as a hit-and-run attacker; bring Floette in, Light of Ruin something, switch out, come back in once you're able to get a Wish in and kill something else.
Arcticblast: it's a Powersaves thing - here's Serebii's updaded dex entry