The 85f3.5 Apo Lanthar is my "fair weather" lens for Nikon Rf's. It is light enough that it can slip into a pocket, but very sharp! It is a true apochromatic lens and a bargain to boot. I have both the 90f3.5 in LTM mount and the SC 85f3.5. Admittedly. I do prefer the 105f2.5, but sometimes you dont want to haul something that size around. The Nikkor 85f2 is a great lens, but again, it is big and heavy.
The slower speed limits the use a bit, but that is offset by portability. I think they are still available as end of procution runs, so the trick is to pick one up now, while the prices are decent and before it becomes a collectible (as I suspect a lot of the S-mount CV lenses will become in the end). Just look at all the people who hesitated about the Nikon F to SC adapter and wants one now - and have to pay twice what is was new on E-bay!