Reduction is not something that you want to do to lessen grain or improve acutance. It's purpose is to salvage negatives that have been improperly exposed or developed. I doubt that it would improve acutance.
There are 3 types of reducers.
o Cutting or sub-proportional
Each addresses a different problem. Their use is usually the subject of an entire chapter in such books as Ansel Adams, The Negative. Depending on whether the ferricyanide and thiosulfate are mixed together or used seperately Farmer's Reducer can be either a cutting reducer or a proportional one. When mixed together the reducer lasts for only an hour or so and cannot be saved.