With super low stats like this, a tower boost monk is pretty much required.
1. Left over DU? You can make a second physical wall if needed at #1. Just another barrier for the bosses to try to hop over before killing your towers.
2. place the wall on top of the barrier already there, making the wall a bit higher so the bosses have a less chance in jumping over it
3. I used hero boost and Dps EV to kill bosses from behind the physical and relfect barriers.