I have a 3/36 build with a scythe and it's a lot of fun, it's probably not what you're looking for since the thing only has 85 speed (and that's an elders scythe).
You obviously die easily, from like everything, but the damage output isn't really all that bad, I can fight almost everyone as long as you keep focusing on getting good hits in. Hold attacks to the face are my favourite
.
Often people ask about my build and don't believe I only have 3 str, but my build at 30 is 1 PS, 12 ath and 10 WM.
It's really good fun, you can catch up with all those silly archers who think they can just run away, and it's awesome to backpedal away from big groups of confused enemies.