The 85 L is NOT a wedding photography lens. It is much smarter to go with a lens such as the Canon 85 1.8, or the Sigma 85 1.4... MUCH better for on-the-go types of shooting... =Matt=
I'm a 35 + 85 kinda guy. I'd use a 24 and a 50 too, but if I already had a 24-70, 70-200, and a 50, ...my next prime purchase would be an 85, for sure. =Matt=
Another +1 for the 35 1.4L I shoot about 80% of my weddings with only the 35 1.4 and 85 1.2. The other 20% I flip flop between about 6 other lenses, but for the bulk of my work, it's those two primes. So since you have the 70-200 I'd say 35 1.4 is the next one to purchase right now.