I dont know if this is even considered an exploit but many people dont know about it:
When hes casting Mighty Smash you leap at the exact same moment when the cast is finished (working with warrior heroic leap also probably).
What you can do with this?
1. You stand at the entrance and leap on the ground you will get imprisoned at the entrance and people will insta get you out.
2. You are on top where people get executed and you leap there so you can insta free someone.