The current "Gun Gurus" seem to be preaching the use of standard sights along with a RD sight. Really, this is a clear case of overkill. The current issue RD sights boast battery life of 100's if not 1000's of hours. They are tough as nails and 100% reliable.
If you think about it, about 25 years ago it was common practice for rifle hunters to carry both iron sights and a scope. You cant hardly find a bolt action sporting rifle with iron sights any more.
If you want a RD sight, dump the std sights and move along.