Stop infinite spawning enemies in boss fights#844

The infinite spawning enemies in a boss fight are not fun. They are just a health tax that the player has to endur during the fight as there is no way to stop them.

If they must stay (as a source of ammo), we could have them spawn in finite waves, at specific Boss Hp %s. Then the player could opt to deal with them and get a brief respite, rather than being forced to ignore them and take random attacks the whole fight.