Cage tips against higher elo?

Hello, any tips or videos how to trick players for the cage? In higher elo players dont run into the wall-stun 😅 its harder to hit W and also they can attack you or stun u too if they standing/running in the cage not stunned.

Also there is a rune, that gives u speed after a cast, but match stats says it did not activate ever… how is it possible?