Marowak and Typhlosion don't do much other than stacking weaknesses with the team. Replace them with Torkoal and Infernape. Replace Volcanion's hidden power with earth power to cover electric and poison. Give Heatran 4 HP/252 SpA/252 Spe timid for more power. Replace protect with taunt to prevent stuff like hazards and setup sweepers. Give Victini a choice scarf to make it better at revenge-killing, and 4 HP/252 Atk/252 Spe jolly to take advantage of u-turn, v-create, and burn immunity. Teach it v-create, u-turn, bolt strike, and zen headbutt.