I think I goofed. In Slaughter Field, dyring darkness activation, do you spawn enemies? Or do the spawns only happen when waves begin?
It became impossible for my girlfriend and I to finish the Act with just the 2 of us because I was spawning enemies in between waves. We were able to get to wave 5 by shooting and hiding (Archer and Brigand). Once the mini-boss came on scene, I sort of GM/House-ruled it so that all the minions and Captains left the field out of respect/fear (which was a fun bit of artistic license, complete with dramatic narration in the spirit of the game.)
Do darkness activation spawns only occur when lairs are present?
You only spawn from darkness card when there are lairs. So in Slaughterfield you only spawn waves.