Mobs that become hostile if they are above a certain level

Currently, as the title suggests, I am trying to create a task that involves attacking mob AI and goal players with a macreator, which is more than a certain number of mobs, which will become hostile to the player if there are more than a certain number of them as the same mobs as me, but I just can't come up with a plan. If there are any experts please let me know.