That looks pretty interresting and promising. Definetely like it. I would advise to experiment more towards lightning and light colors especially. For now it looks rather goldsorcy and blackmesy, if you will. I would advise the following lightning scheme:
I would try white lamps on these round crete walls, then little fancy green lamps on top, and red cautionary lights in front of rocky bases. Color placements could be switched, you should try which one fits better. Certainly, it is all up to you Instant Mix, that's just my vision.