Before you dig in here, be sure this is the right premises!
Sound travels extremely well through concrete.
Also concrete walls give rise to very strong room modes.
Soundproofing is much more difficult than acoustic treatment.
Details are absolutely crucial. You could buy Rod Gervais book. There are also plenty of construction details over at john sayers site and studiotips.
You have assembled a collection of materials, some of which are quite controversial.
There are very divided opinions on MLV for instance.
Plasterboard, some say three layers of different thickness, some say the same thickness. There are denser 'acoustic' plasterboards. IMHO, the detailing is more important than these choices, e.g. fill all the gaps carefully, and carefully follow a screwing and glueing plan. Neoprene or such at all edges.
I haven't used Green Glue so I can't attest to performance. I would imagine 3 layers of it would be expensive. I would be more inclined to first find a very high performance RC e.g.
WallComp, UK - CMS Acoustics
You need to find out where that footfall is coming from? You have not described your ceiling?
Floors- MLV? Hmmmm. I would be very sure of the cement impregnated MDF though. I would steer away from controversy, find the area of consensus. Find the best resilient floating material, one that won't compress or get hard. I doubt that Green Glue is the best choice here, but I would be open to experienced opinion on that. Again, seal all gaps, screw it together intelligently, and so on.
SuperChunks rock, go for the biggest ones you can. 32 inch is practical.
Sorry to repeat, but be sure you are in the right building!
DD
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DD