I always found Mamo to be a bit Overrated because his resistances are so bad he is tough to get in other than revenge.
Still, Adamant Life Orb hits like a TRUCK. What is the point of Jolly, again?
ImStillGood (Salamence) (M) @ Life Orb
EVs: 252 SAtk / 252 Spd
Rash Nature (+SAtk, -SDef)
Draco Meteor / Flamethrower / Brick Break / Roost