If your looking to play the fast you probably already know enough about Jhin and how to play him so I won't describe how to play him here. If you want to look into any of the other numerous guides on this site for that.

The fast is really fun and does a lot of damage but is easily countered by assassins that catch you off guard like Shaco and Nocturne. I would only advise this if you already know how to play Jhin.

Be fast my brethren, show riot they cannot stop our stampede!