Why was it so hard to answer his question? The answer is no, however, the proc rate of the set bonus will decrease slightly. You need at least two af3 pieces on at the end of casting for any chance of set proc. Some sets seem to have a larger increase in proc rate if all five pieces are equipped.
Are you kidding? someone make a mistake and get a helpful answer before getting the ***beat out of him for making a mistake? in FFXI? looooooooooooooooooooooooooooool