So you make KO’s a property. [scope player] You then have a lifecycle set to ‘player knocks out’ that increments a counter [scope player] that updates the property.
Create another property for the # of kills that the leader has.
Next, make a loop to constantly trigger block code in a trigger to check if the number of kills the player has [first property] is greater than the second property. If it is greater, set the second property to the first property, and transmit on a channel that makes a waypoint follow that player.