On MH-B99_MinasTirith I found that in addition to the monsters there was also a player bot on the map. With help of someone else there's now a skin on that bot, so you're not fighting a blobby green looking person, so the map has 3-way combat. You, the player bot, and the monsters.
Nobody likes each other, everybody's trying to kill each other.
I recently edited a map with only nali-cows as the monster. For the Hell of it, why not? I figured I'd add a player bot. Kind of a cattle rustler stopping the poaching of the herd (even though a player bot would kill the cows too) and I slapped a Judge Dredd skin on the player bot.
Thing is when I played the map the player bot wasn't visible.
First try doing this, not sure where I went wrong.