Delay the gameplay of the delayer so that you can both see each other where they really are.
Best example is a stream delay on twicth to avoid cheating.
Remember that one girl who was using a vpn on one account, and good wifi on the other? She could see where you were in real-time, while you not being able to hit her.
So, the game is delayed on delayer's screen by their ms count 300ms/.3secs
Resulting in you hitting where the server is registering them, and them being where you are hitting at that point in time. Cancelling their delay.
Delayers will still have to hit early, this just puts people with lower ms at an advantage, resulting in people getting their ms as low as possible.