yea see, exactly the kind of argument that's unhelpful.
what makes it so easy to beat? how many times (roughly) have you even faced a volcarona? Is it predictable?
examples and proof would help in a discussion like this.
i've tried out the chesto rest set, it is undoubtedly one of the best sets to run...other than sub. As long as you keep sun up, watch out for SR and rock type moves, your guaranteed at least 2 pokemon down