...snip...
goto step 2 and repeat.
each cycle will take 16*10min = 160 min if you have one GPU.
This trick will increase your likelihood in finding the key as times increases and not wait 180 years (1GPU) or 5 years (36GPUs). LOL
I like the idea of including randomness in the process. Because in the end you don't have to search any repeating patterns if consequently followed (0101, 1f1f).
It is possible in theory these patterns appear but very unlikely in practice.
I thought about ignoring ranges completely and just generate random starting offsets for each GPU working point. This would raise the factor of luck by a magnitude but make inclusion of deterministic methods harder.
You can't ignore ranges completely because bitcrack is not designed so. If you start an offset for each GPU working point, things will awfully slow down ...