If I was was to teach castform 2 weather moves, what?

Question

2 moves should I choose? to cover weakness and beat other types, and 1 attack move other than weather ball

Answer 1

Sunny day, solar beam, wheather ball, hail.
It is better with just one weather choice so then you can use a better fire move like flamethrower, instead of hail.

Answer 2

Hail, sunny day, blizzard(tm), and rain dance.