Hmm, why not slabs? Bricks are so small and the structure so huge. :)
The only matter of taste thing I've got to offer, is that I kind of feel the two truncated pyramids and the "onion"-domed round tower, are rather different in style and that something like an octagonal tower, with tall arched window slits at the apex and a simple squat pointy roof, might make for a more coherent whole, if that's desireable - you may well have them different on specific purpose. What do I know, though... I wish Pappou was still around to offer achitectural advice :).
No "claw" assembly? Maybe beam the light from the (wide) base of the tower to a reflector up top? (..with the light source suspended in a very large parabolic mirror, slightly elonglated, so that it focuses on the top reflector.)