On your DeVille: Drive channel, gain at 3-5 (depending on master volume), bass @ 4, mids @ 10, treble @ 1-2 and presence flat out. On you tele: Bridge pickup and roll back tone control all the way. Strike a chord and turn tone up until you get some bite shining through. This should be pretty close. It will not be a Marshall stack, but there aren't many pedals that will get you much closer. If you don't like it, you have at least not spent any money. Oh, and turn that comperssor off, at least for the AC/DC stuff.