Your 70-200 is the bees knees for sure. I wish I could afford that lens. The 135 is 100% absolutely as awesome as everyone says it is. Sharp wide open (how many primes can say that) and dat compression, but in reality the 85 has that more shallow depth of field and 85 is, for me, the optimal fov along with that shallow dof, creates a great lens. The autofocus is slow, yes, but slower than manual focus? Also, if you plan on using the 1.2 for anything else besides studio or you know you have the time to get the shot then you should be using 70-200. If you've got the time to focus and get that shot with the 1.2, then it'll be a better lens.
Again, just my opinion.