You are wrong. The VSS tells the computer you are moving, without it, you are at a super rich mixture(idle) and your timing will not advance.
Don't believe me? go unplug it. It's a fact. None of the devices you mention will help you without it. The MAP/MAF, TEMP, AND O2 have nothing to do with timing. The o2 sensor will not compensate for the addtional hydrocarbons present.