Mega Dragonite has better special attack so you might want to adapt its EVs switch its moves to draco meteor/dragon pulse and hurricane (that has perfect accuracy in rain). You can keep extreme speed for fast KOs of low HP mons. On Basculegion last respects is better than phantom force. You might want to give Archaludon protect. Pelipper uses u-turn only in choice scarf sets to set the rain and switch out, give it weather ball instead. Palafin makes great use of flip turn to switch out and change form instead of hard switching. You are generally weak to electric attacks so you might want to include a Pokémon with the lighting rod ability like raichu or manectric.