Thank you Gen1UUFan, the team is better than before.
I followed your advice, changed Politoed to physical defensive set, Moltres to Specs, Rotom-W to Scarf and using a special defensive Tentacruel instead of Donphan.
Moltres has a new Evs speard of 72 HP / 252 SpA / 4 SpD / 176 Spe, 176 Spe to...