I think Ragnarok mentioned a few that Lae'zel's Frightening strike was extremely effective as well as push attacks from Eldritch blast (Wyll), and Thunderwave(Gale). None of that is Homebrew btw.
Frightening strike is homebrew though. It is way much stronger that its tabletop counterpart.
Sorry, the correct name of that ability is Menacing Attack and it appears to work exactly the same as listed in the PHB.
"When you hit a creature with a weapon attack, you can expend one superiority die to attempt to frighten the target. You add the superiority die to the attack's damage roll, and the target must make a Wisdom saving throw. On a failed save, it is frightened of you until the end of your next turn."
What's different?
