Could you post some screenshots from the material editor and the results you are getting? That would be super helpful. :)
Yes,
I've uploaded two images. The first is with the UVW Randomizer placed after the Corona Triplanar component (on each map, diffuse, reflection, bump, and displacement). The second is with the UVW Randomizer placed before the Triplanar component. As you can see in the second image, having the UVW Randomizer before the triplanar results in a spotty appearance.
All of the setting in each of the UVW randomizer and triplanar components are the same. The randomizer is set to a range of 0 to 1 on U and V, and W is set to 0 to 360. The scale of the triplanar component is set to 1" which is the default unit of this particular 3dsmax file.