>>31674413Adamant to take advantage of it's massive Attack/coverage, unless go Jolly if you want to outpace certain Speed benchmarks.
Oblivious makes you immune to Taunt which works to be one of the best Sash Stealth Rock leads out there, As well as Endeavor to weaken a foe +Ice Shard to pick them off. Although Thick Fat gives you a resistance to Ice & cancels out your Fire weakness, just keep in mind Mamo only has mildly decent bulk to begin with.
Icicle Spear/Crash are strictly up to preference, as Spear has perfect accuracy but multi-hit moves can be unreliable power-wise. Crash on the other hand has constant power & can occasionally flinch but is 90% accurate.
Despite it's atrocious Special Attack, you can run Naive Nature with Freeze Dry for a surprise factor on bulky waters or 4x weak threats like Gyarados that think they can setup on you.
Other than that, Knock Off is a fantastic support move from ORAS tutors, but really it's just what you want it to do for your team.