I agree with David. Lighting always, always should support the story.
Look at the subject's eyes and watch for the reflections of the lighting setup. To me, it looks light they had a space light hung from overhead (probably a 1K or 2K with a skirt), the visible kicker from camera left and a light on the background (looks like it might even be backlighting the background material). There might be a fill light or bounce coming from camera right.
It's going to be a challenge to get the same results with the lighting you listed above. Using one Dedo as the left kicker is the easy part. You could hang one from above and aim the other hitting the background with one soft boxes but I'm not sure the ratios will work out well. You'll probably have to get the top light pretty close to the subject's head.
I'd suggest borrowing or renting lights with higher output and soft light.
What camera are you shooting with? With only 450w of light your camera will need to have good low light performance to work with only the Dedo lights.