I would have a silenced AR and a Silenced SMG class w/ ghost, SoH, and Hacker. I would get ninja pro just in case they do patch the sound, but get it in normal, respawn games. No point in giving up your perk three in such a competitive playlist.
IMO ghost really isn't all that needed in SnD. Barely do UAV's because most people use RC-xD. Flak jacket is much more useful because of the constant explosive spam that occurs. If on the odd chance that a UAV DOES happen to go up, camp a place for 30 seconds with claymore/motion sensor