tl;dr I'm making a team to finally go against battle maison. I have blaziken as a baton passer and kangaskhan as the mega but i'm having trouble filling out the third slot. My plan was special sweeper, and I have a pretty perfect gengar but if i'm not using his mega form is he even worth using as a special sweeper.

Do I use life orb gengar or something else as a special sweeper to cover kangaskhans "weaknesses"