"Rules don't apply to me". OK, now we know where you stand.
Depending on aspect, some weapons and pylons might be an order of magnitude (0.5 m2 vs 5 m2) less than a clean MiG. But not "multiple" (either 0.05 m2 or 0.005 m2) which is what you originally claimed, and then changed to the meaningless "some order of magnitude".
But in any event, you can't consider them in isolation because the weapons and pylons create multipath scattering and dihedrals relative to the airframe. These effects and the RCS of the weapons and pylons can be adjusted with treatments and shaping, but I have seen no evidence that it can create multiple-order effects.
And the statement "LO combat platforms with external stores are still multiple orders of magnitude more stealthy than non-LO platforms with the same external stores " still appears to rest on the assumption that stealthy airplanes magically cause things attached to them to have lower RCS.