Why you don't just double track?
Right, most of that "biamping magic" happens because of the slight delays that the different amps create. If you put that into mono, it sounds like crap or phases like hell. I always record 2 to 4 rhythm guitar tracks depending on the music style and complexity. When doing 4 track, pan them left, half-left, half-right and right. Put the most accurate takes to extreme left and right and use a sound with a little less gain and more definition for that tracks.