Hard L/R pan is sort of a standard when it comes to metal man, mostly because it works like 99% of the time. If you're using two pretty different tones, I'd do 2 tracks per side, mixing the two different tones on each side. Like this:
Left: Take 1, Amp A + Take 1, Amp B
Right: Take 2, Amp A + Take 2, Amp B
That way you get the blending of the two tones, but consistency across the stereo spectrum :yesway:
Edit: Made a slight mistake! Also, you WANT some slight differences between the two sides anyway, having exactly the same tone either side is gonna give a sort of mono feeling to the guitars, even if they're hard panned.