Your shutter speed is set really high, unless you're shooting sunballs, I set it more like 125th/180. I'd try to get it a little closer and position your strobes a bit closer, you simply aren't getting light on your subject (at least in #1).
I experimented with the 100 vs 120 diffusers and found the 120s are simply too wide, I was getting backscatter on the outside edges of my shots no matter how far away I positioned them. The 100's are fine and with power set to 2/3rds you should be able to light up the world.
We have a free handbook on Strobe Positioning that should help as well.