I had the satchel problem before, that caused all AI on floor 2 to die when you blew the oil tanks at ground floor. Fixed it by making the AI indestructible and placed an event that caused them to be destroyable again when you got to the second floor. Not sure how to do that with NILE, as indestructible event is yet again one of the things missing inside WAC.
lol not worried about the AI just the triggers for level gates in rooms above lol i have triggers on each floor of building to get so you can procede to next floor after gates unlocked
i was only going to hide the triggers as tht will save typeing so much also ;)