They aren’t all the same so why would a flat score be the requirement? They have different enemy counts and require different amounts of time. If the only way to get the required score on ANY nightfall is to use some sort of unintentional farm or exploit, the score is too high. It would be a bit much to expect that each nightfall have its own threshold for this requirement, so the requirement needs to be lowered. Basically, it needs to be naturally attainable from playing through and killing all the enemies without triggering the point loss penalty for taking too long. If a team can do that, that should be good enough.