All credit for this solution goes to CrazyFred77. He posted this in the comments of the other solution.
According to this post always in the official forums > https://forum.deadbydaylight.com/en/discussion/34936/derange
... you need to proceed like this:
- Frenzy hit a #1 survivor (after that you're in killer instinct mode)
- Frenzy hit a #2 survivor (to regain your frenzy mode full)
- Frenzy hit the #1 survivor before his timer ends, and you need that last hit down him.
Read that forum post in the link. Follow the directions there and you will receive the achievement.