Originally Posted by Fat Bent1ey
Rephrased the question.
Much better. Still kind of subjective but I'll answer it anyway.
It's definitely an interesting set. It can do a very good job of setting up for a revenge kill provided it outspeeds the other pokemon. With a Sash you're always guaranteed to get both rocks and Memento off assuming you can keep their rocks off the field. The most effective way to do this is to just lead with it, but many of the other common leads in the metagame will either beat you outright and be immune to Memento that way (Mienfoo, Abra), or not be worth using Memento on (Bronzor, Hippowdon). I guess overall it's about as useful as any Memento user, which is to say that it's usually not the best option for a team.