Best way to reduce setup time = a permanent darkroom
Best way to reduce time it takes to make proof sheets = good loupe, clear negative pages and a light table

If a permanent darkroom is just not practical, I have always liked the idea of a Nova Slot Processor that allows one to just store the chemicals in the processor. In fact I think it would be nice to have an 8x10 version of that in my permanent darkroom, so I can just fire off an RC print quickly if I need.