Oh, this is a good team with a good pokemon, CurseLax. I really like it but I will suggest one thing:
Hidden Power [Fighting] instead of Hydro Pump on Rotom-w.
Hydro Pump vs. Adamant 252 HP TTar = 263 Atk vs 256 Def & 404 HP (120 Base Power): 178 - 210 (44.06% - 51.98%) 29.70% - 35.15% in...