In SSB4, there are multiple ways to proceed:
1- Do the Kirbycide/Dededecide method (B, and shoot them out of the edge).
2- Use a character with a counter (Shulk, Lucina, Marth qualifies for this).
3- Pick a character who have a long grab range (Samus, ZSS, Link), and throw them out. It's better if you're on the border of the ledge, so the AI will "glitch" and hit the stage. (thus, a free KO is guaranteed)
That's all. But yes, that mode is insane. Lv7 CPU x Knockback x2 for you is horrible.