This was why I mentioned the string as a bass drop. It's not a legitimate guitar tone ala Beatles/Hendrix/Vai/Smashing Pumpkins... it's a bass tone. However, there is plenty of history of similar instruments playing the same notes (orchestral music FTW) and you get lovely textures by running a high bass line over a low guitar or playing the same notes or something else. The rules are already there; guitar just hasn't used them much. Although the Bass VI does make a mockery of the idea that this is a unique idea to djent.i look at it a different way.
also, you must really hate your bass player. hell, you may as well just *play* a bass.
I personally would simply use the same string you use for F# and tune that guy down. I think you're doing yourself a disservice buying a third guitar for it though. Better off getting a longer scale Squier Bass VI if you really don't need the sound.