Upload & Sell: Off
I don't have as much experience of other people here but will chip in what experience I have to date.
I have the 14-24, 24-70 and 70-200 coupled and also the 85mm f/1.4, bodies are D3 and D700.
I would say a second body and a SB-900 is a must, I would not do a wedding without a back up flash and body.
The 14-24mm for me does not get used a lot, maybe one or two shots a wedding, for me the lens has two purposes, one is for wide angle stuff, but the second and to me more important role is a back up for the 24-70mm, the 24-70mm is the workhorse for me, and if I was to damage it I could use the 70-200mm on one body to cover the long end, and the 14-24mm on the other body to cover the wide end (another advantage of two bodies). I see you also have the 50mm so that would help as well, but if your 14-24mm was gone, you would have no back up for the wide end.
At the moment I'm thinking of selling the 14-24mm and replacing with the 24mm f/1.4 and 16mm fisheye, that would mean two sets ups, 24-70mm and 70-200mm on two bodies, or 24mm & 85mm for low light, the fisheye could then be used for the odd rare shot when needed.