Your initial placement looks interesting. the light is nice bu not overpowering. I think 2 areas could be improved. The placement of all your elements leads the eye to believe that the scene is cocked to the left just a bit...perhaps some straightening could help this. The mecha monsters are not very balanced when you split the scene in two, especially where they get larger at the upper-rear of the perspective. This is a big work..lots going on...many of your elements are very well done...just a few minor issues that i perceived.