I find it an impossible question.
I often carry just a two lens set, consisting of the 60 mm + the 150 mm.
If you have to be restricted to only two lenses, that is not a bad set at all.
The 80 mm itself is a great lens too: great quality, and very versatile. It would make a perfect one lens 'set'. Neither too short nor too long (which is why the 60 needs the 150 and the 150 needs the 60 in that two lens set - neither lens would make a great one lens 'set').
60 mm and 80 mm are close, but different enough to keep both in a three lens set.
But in the end, it all depends on what you like, want or need. What works for someone else may not work for you.
That sort of thing.