Ambipom @ Life Orb  
Ability: Technician  
EVs: 252 Atk / 4 SpD / 252 Spe  
Jolly Nature  
- Power-Up Punch / Low kick / Fire Punch / Nothing 
- Fake Out  
- Return / Last Resort
- Knock Off / U-Turn / Nothing

Role + Set
Pretty much a fake out spammer in the team. Is able to OHKO some dangerous threats with fake out (Smeargle, Swellow after rocks). It can be used as a late game cleaner or just deal "chip" damage with fake out over the course of the battle. Can be ran with a 4 moves set or the classic Fake Out + last resort set. 4 moves is preferred because rock and ghost mons are aplenty in the current meta. 
Calcs (inherited 150 attack)
252 Atk Life Orb Technician Ambipom Fake Out vs. 0 HP / 40 Def Mewtwo-Mega-Y: 181-214 (51.2 - 60.6%) -- guaranteed 2HKO
252 Atk Life Orb Ambipom Last Resort vs. 0 HP / 0 Def Kyogre-Primal: 363-426 (106.4 - 124.9%) -- guaranteed OHKO
252 Atk Life Orb Ambipom Knock Off (97.5 BP) vs. 248 HP / 0 Def Marowak-Alola: 281-333 (86.9 - 103%) -- guaranteed OHKO after Stealth Rock
252 Atk Life Orb Technician Ambipom Fake Out vs. 0 HP / 4 Def Smeargle: 312-368 (124.3 - 146.6%) -- guaranteed OHKO 
252 Atk Life Orb Technician Ambipom Fake Out vs. 0 HP / 4 Def Swellow: 214-253 (81.9 - 96.9%) -- guaranteed OHKO after Stealth Rock
252 Atk Life Orb Ambipom Last Resort vs. 252 HP / 252+ Def Clefable: 211-250 (53.5 - 63.4%) -- guaranteed 2HKO after Leftovers recovery
252 Atk Life Orb Technician Ambipom Power-Up Punch vs. 0 HP / 0 Def Tyranitar-Mega: 265-317 (77.7 - 92.9%) -- 31.3% chance to OHKO after Stealth Rock
252 Atk Life Orb Ambipom Last Resort vs. 40 HP / 252+ Def Alomomola: 274-325 (56.9 - 67.5%) -- guaranteed 2HKO after Stealth Rock and Leftovers recovery
252 Atk Life Orb Ambipom Return vs. 0 HP / 0 Def Nidoking: 298-352 (98.3 - 116.1%) -- guaranteed OHKO after Stealth Rock