For future games using the defense battle system, I'd love to see the archer have their "cone" filled, because at the beginning, with the poor accuracy you start with, you can't reliably block the enemies.
Alright people. For me, building the elevators in sections worked wonders. I use the NORMAL elevators, but I only make them go, say, five floors. Then I move it over to another Horizontal area. This makes people walk more before they get to an elevator, which means the elevators are less full. Worked for me anyways. Oh, and leave one or two staff elevators.