if ur deck doesnt have steelix ex or anything that can hit the bench or free retreat poke, SWITCH is the way to go!
Switch can destroy their active poke - assuming that u have lugia ex to be switched and kill hem.
w.point is second. this goes best with steelix ex, but u can also use it as a 5th windstorm.
the others are tools, so when the pokemon is affected by special conditions, they CANT retreat! BTW they can be windstromed