Good play here - but this is hard stuff. Overall it's too dark to my eye and looks underexposed.
I agree w/RM - no lite panels needed. Reflect off of large pieces of bristol board for 2-4 dollars for larger areas. Then use Gobos (anything that blocks light) when needed and small to teeny reflectors for local areas that need pop. Use more backlighting and you'll see an even huger difference.

Way back when Jesus was a toddler we set up shots like this in photo school. We were given 4 hours for shoots like this.
3:45 minutes was spent on manipulating the light.... these shoots are very hard indeed and much patience and fiddling are required.