Adjusts the hosts health based on how many players are present.
- amount (int): amount of health per player present
- max (int, default 0): max amount of players health will scale for
- after (int, default 1): base amount of players needed for health to scale
- range (int, default 0): range at which players are needed to be in to enter health scale
- healAfterMax (bool, default true): wether or not the entity will heal after max