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Holy shit I fucking did it bros. I solo'd it with these three. The trick is to use hypnosis every turn at the tail end of the attack immediately after it. If it's a stat boost it's right before the totals show up on the bottom. So the move order is
>Wake boost
>Skyla boost
>Hypnosis
>gust with Skyla after fully boosted instead of boost
When Wake is fully boosted use gust and then sync and at the tail end of when that forcefield circle disappears use Hypnosis. Then alternate
>gust
>waterfall
>Hypnosis
And you have to time Hypnosis at the tail end of gust. It's easy to tell because gust hits the light screen and makes an oval. This also works with sync moves. Basically use Wake's sync instead of Waterfall. Fuck using Kukui this worked better for me. I don't even have Leaf either.