No offense, Trachy, But That Moveset Sucks! Heres What I Would Have:
Poison Jab(STAB, PHysical, so better for muk), Brick Break(Good Coverage), Payback(Good for slow muk), and Rock Slide(Coverage).
These arent that powerful, but they are the best, for muk, as his sp. attack is low.
Or You Could do this strategy: First, Use Toxic(The Damaging Move Of This Set), Minimize(So Muk Cant Be Hit, Use Multiple Times), Screech(Sets Up Swagger, Which Does More Damage To Themselves, if they have low defense), And Then Swagger(After Screech, If They Hurt Themselves, They Will Lose Half Their Health. Plus, They Still Cant Hit Muk Because of Minimize, so even if they don't hurt themselves in confusion, they still don't kill muk.).