I had 3 70-200. The f4, f4IS, f2.8.
For my style of shooting, i prefer so much the f4IS (mainly portrait). My 2 f2.8s were soft @ 2.8, so rarely used at this aperture. At f4, the f2.8 lens was a bit under f4 lenses IQ and twice the weight.
After, I shoot sports with the f2.8 (cycling and triathlon) and I find the AF a little bit not responsive on 5D2. So I prefer 135L for this exercice.
Maybe the 70-200 2.8L II is the key ?
Either get rid of your 85L or the 135L and fund for the 70-200L IS II. It’s like a 70mm through 200mm L prime it’s THAT good!
(For the record, I did have a 135L and 85mm 1.8 and none were as good as the 70-200 IS II) Although I was crazy about a 135L, it was my favorite glass.., until I got the 70-200 IS II