Nice. I was messing around with the idea of improving this rush as well and tried a version with:
-2 Long Sword, +2 Longbow
-3 Light Tower, +3 Light Pendulum
-1 Light Tower, +1 Archangel
I -think- I managed 4TTW with that build once, but I neglected to take any stats so I can't recall. I'd be interested in testing this though.