For 25 years I had only a 28mm, a 50mm and 75-150 zoom. I traveled halfway around the world with these three and seldom ever used the zoom.
Now that I have one, I would substitute the 85/f2 for the 75-150.
Or take only two, a 35-70 mini-zoom for daytime and a 50/f1.4 for low light.
OM lenses are small and light but you still want to be sensible.