so what should I use it for defence atack or one of the sepicail stats
You can evolve Misdreavus into Mismagius using a Dusk stone.
Link for dusk stone
Then you have a Pokemon who is more powerful.
Mismagius works best with Special attacks and Speed.
With a base of 105 in each stat that's the way to go.
Here are some movesets that you can use for Mismagius