If you are printing colour negative there will be times that you will require to use cyan filter to achieve the colour balance you want.(cross process negatives come to mind) This will be in conjunction with either the yellow filter or magenta filter (but not both) using all three filters will only add neutral density.
For cibachrome printing we generally using the cyan and magenta filters as a starting pack. cfk usually and also the new universal paper.
For Black and white you should only be using the magenta or yellow filter
more magenta will increase contrast.. adding yellow will lower contrast
Bob Carnie