>>49346323252+ Atk Life Orb Lilligant Steel Beam vs. 252 HP / 252+ Def Toxapex: 149-177 (49 - 58.2%) -- 98% chance to 2HKO
252+ Atk Choice Band Lilligant Steel Beam vs. 252 HP / 252+ Def Toxapex: 172-204 (56.5 - 67.1%) -- guaranteed 2HKO
+2 252+ Atk Life Orb Lilligant Steel Beam vs. 252 HP / 252+ Def Toxapex: 298-352 (98 - 115.7%) -- 87.5% chance to OHKO
252+ Atk Life Orb Lilligant Steel Beam vs. 248 HP / 252+ Def Eviolite Chansey: 372-438 (52.9 - 62.3%) -- guaranteed 2HKO
252+ Atk Choice Band Lilligant Steel Beam vs. 248 HP / 252+ Def Eviolite Chansey: 429-505 (61 - 71.8%) -- guaranteed 2HKO
+2 252+ Atk Life Orb Lilligant Steel Beam vs. 248 HP / 252+ Def Eviolite Chansey: 742-875 (105.5 - 124.4%) -- guaranteed OHKO
252+ Atk Life Orb Lilligant Close Combat vs. 252 HP / 4 Def Ferrothorn: 255-302 (72.4 - 85.7%) -- guaranteed 2HKO after Leftovers recovery
252+ Atk Choice Band Lilligant Close Combat vs. 252 HP / 4 Def Ferrothorn: 294-346 (83.5 - 98.2%) -- guaranteed 2HKO after Leftovers recovery
+2 252+ Atk Life Orb Lilligant Close Combat vs. 252 HP / 4 Def Ferrothorn: 507-598 (144 - 169.8%) -- guaranteed OHKO
Chloroblast, Close Combat, Swords Dance, Filler is mainly all it needs. Filler could be coverage or Sleep Powder or something.