Golem @ Leftovers  
Ability: Sturdy  
EVs: 252 HP / 32 Atk / 224 Def
Impish Nature  
- Earthquake  
- Stone Edge  
- Toxic  
- Stealth Rock

Silvally-Water @ Water Memory  
Ability: RKS System  
EVs: 248 HP / 100 SpA / 160 Spe  
/ 252 HP / 92 SpA / 164 Spe
/ 248 HP / 124 SpA / 136 Spe
Timid Nature  
- U-turn / Parting Shot
- Ice Beam / Surf / Flamethrower
- Thunderbolt  
- Defog
92 SpA Silvally-Water Thunderbolt vs. 0 HP / 4 SpD Floatzel: 236-278 (75.8 - 89.3%) -- guaranteed OHKO after Stealth Rock and 1 layer of Spikes
124 SpA Silvally-Water Flamethrower vs. 0 HP / 0 SpD Abomasnow: 324-384 (100.9 - 119.6%) -- guaranteed OHKO