[Autumn]

It matches up to fleur by allowing you to double dip on unsure hit chances and critical chances, with usage of low momentum mobility or skills such as dagger incise you can still follow up a botched attack with another action that assists you in a way that fleur could not have. If you want to make sure that the attack does reasonable damage you can absolutely do so by pairing it with on-hits like you just mentioned. The meme-tastic CM Overtime build with twin Tessens is fully capable of shitting out 1-2k damage in a singular round depending on how holy weak your target is.

Relevant enchants such as Volcanic Seed and Rampaging also benefit from this fairly well, both fleur and twin dance have great different strengths but serve functionally the same purpose, twin dance is better when it succeeds while fleur is strictly worse when it doesn't succeed, so you end up with a risk vs reward sort of deal.