At the moment I work with :
I would like to re-buy the 135 2L for modelling as a compact tele on top of my 70-200 2.8L IS (MKI). It's less heavy, and a nice candid lens, would you find this double seen the range ?
Does 135L have the same amount of blades and +- same bokeh as 135L both at 135mm wide open, I don't know if the bokeh/sharpnesss difference is minimal or clearly visable ?
I would sell 1 lens, but it's difficult as they are all great, maybe 85 1.8 and the rest save some money...
I could also work with only primes on the short end 15 2.8 - 35L - 85 1.8 - 135 f2L followed by a handy 70-200 2.8L IS zoom.
Don't know if I would miss the 24-70 zoom.