With a multigrade head, unless your exposures are too short for comort, you can simply leave all filters at zero, i.e. use unfiltered white light. Filtration has the effect on graded papers only of attenuating the light; a strong yellow contrast or cc filter might even act as a safelight, or at the very least will greatly reduce the paper's apparent speed.
Grades 2 and 3 will probably cover 80% of your negatives if you meter everything and are consistent in developing. The other 20%, you can split filter on multigrade.