Double Uppercut: not so interesting?

There's the practicality of two guaranteed hits as opposed to FF kbing too far or not having enough range. Or does it not guarantee the two hits like Double Stab does?

Otherwise, it's marginally better, but not by much. It's more of a set up for Stun Mastery. Especially since it hits twice.

Backspin is 3 monsters. You're 5x. You should already have a point into it.