I'll just give you my wedding gear (basic) when I did them, and you can use that info however you want:
5D Mark II
1D Mark III
85L f/1.2L II
24-70 f/2.8L I
70-200L (had I first, then upgraded when II came out)
135L (a fantastic lens!)
When I begin doing weddings again, I'm going to bring my 16-35L II along, 24-70L II instead of I, plus the above lenses. I may bring my 200 f/2L for the heck of it. Will I use every lens? Probably not. Better safe than sorry though. It all depends.
Now, what you want to do is decide which focal lengths and flexibility you need. I needed the flexibility of the 24-70mm range, and saw no reason at all to have a 50 prime considering at f/2.8-4 where I was shooting, was just as good in IQ as any 50 prime. 35L though, that is slightly better and 85L is phenomenally better.
Don't buy all these expensive lenses at once!!
A lot of CF cards. Big ass gear bag, tripod.