great stuff! I'd say #6 is the best. I like how the man's hand points towards the main subject, and the first titan has a nice loop in his form that brings out eyes right back to the main subject. The cropping of the titan really makes it look larger than life!
I'd suggest that you bring the leg of the first titan closer into the hand of the foreground person because right now there is a shared edge that is creating quite a bit of tension. Also, i'd recommend adding more of the biceps of the foreground man because it is creating an odd 'x' formation that draws the eyes too much.
I'm digging this composition and I'm excited to see how it looks!