There is no way this battle can be made fair. If Asagami starts within range of Lucy's vectors, then she is screwed since the vectors travel faster than her own psychic abilities. If she starts outside the range of Lucy's vectors then its unfair for Lucy because she will obliterated by Asagami's abilities before she gets her in range of the vectors.
Unfair for SCP-076-2. While he does have superhuman speed, reflexes, and agility, the vectors are impossible to dodge on account of the fact that they are invisible and he just doesn't have anything to counter them.
Unfair for Scorpion because of the same reasons as the 076-2 battle.