Good Setup for Delta Typlosion

Lately I feel that my Delta Typlosion has needed tweaking and would like some help with its moveset. here are the moves Livewire, Thunderbolt, Thunderwave, and Flash cannon with gentle nature

I like To go rain dance energie ball thunder and flash cannon with mega stone

Why Rain dance?

The ability For his mega, he get 1,5x his special attack When in rain Or intense darkness

Right forgot about dat.