152+ Atk Tough Claws Mega Charizard X Dragon Claw vs. 248 HP / 32 Def Rotom-H: 162-192 (53.4 - 63.3%) -- guaranteed 2HKO after Leftovers recovery
152+ Atk Tough Claws Mega Charizard X Flare Blitz vs. 248 HP / 32 Def Rotom-H: 123-144 (40.5 - 47.5%) -- guaranteed 3HKO after Leftovers recovery
152+ Atk Tough Claws Mega Charizard X Outrage vs. 248 HP / 32 Def Rotom-H: 246-289 (81.1 - 95.3%) -- guaranteed 2HKO after Leftovers recovery
+1 152+ Atk Tough Claws Mega Charizard X Flare Blitz vs. 248 HP / 32 Def Rotom-H: 183-216 (60.3 - 71.2%) -- guaranteed 2HKO after Leftovers recovery
+1 152+ Atk Tough Claws Mega Charizard X Dragon Claw vs. 248 HP / 32 Def Rotom-H: 243-286 (80.1 - 94.3%) -- guaranteed 2HKO after Leftovers recovery
+1 152+ Atk Tough Claws Mega Charizard X Outrage vs. 248 HP / 32 Def Rotom-H: 366-432 (120.7 - 142.5%) -- guaranteed OHKO
Also, what makes it better than Rotom-W at running T-Wave, exactly?
I guess because it can beat threats such as (Mega) Scizor, Mega Mawile, Ferrothorn, and others weak to fire with Overheat without resorting to Will-O-Wisp like Rotom-W does. This frees up a spot for Thunder Wave since Will-O-Wisp isnt needed for Rotom-H to beat these pokemon.
I dont support moving Rotom-H up, but that's why it runs Thunder Wave better than Rotom-W.