I have a set of Mavic Cosmic Equipes which I've had for many years. The wheels were built using a compound on the spoke threads to keep the spoke/nipple from loosening.
Every so often, I'd get a creaking/pinging sound from the rear. This sound was due to inadequate tension on the spoke(s). Eventually, I broke a spoke in the rear and decided to replace all the spokes and re-build the wheel. When I re-built, I used oil on the threads for the reason that the anti-seize spoke compound seemed to make it more difficult to turn the nipples and get adequate spoke tension. This wheel has been noise free for a year now.