The problem I'm seeing is that the 'trigger on death' property doesn't seem to work with the monster_apache. So anything you want to trigger after the death of the apache won't work. For me, the only thing that came close was when I set three apaches in the map and ticked the 'start inactive' flag on two of them. I used a multimanager to activate them at 60 second intervals. I used empty aiscripted sequences that I could call as the first path point (one for each apache). I'm zipping my map and posting it as a download in your problem map area.