I've seen Amp play (twice), and Tortured Soul (3 times) and I can totally see them meshing together nicely. I actually opened for TS DJ'ing at a small club in Iowa City, and I love the way that they're comfortable mixing out of a DJ set. I don't remember what I was playing when they did this, but they picked up the chords and bassline of the track and jammed on it for several minutes before starting into one of their own tracks.
Their set this year at DEMF was actually pretty wonderful despite being lightly attended, due to heat and whatever else kept people from coming out during the day. We were hiding from the sun under the trees to the left of the stage, as was Boo Williams (who played a party later that night). Talking to Boo and doing my exhausted minimum-energy-vector dancing in the trees was one of my more enjoyable moments this year. TS played best during an impromptu encore set due to the next act's late arrival... it's an interesting thing to contemplate, the link between live musicians 'jamming' and a DJ playing a set. In both cases the critical element to both things is an interactive connection between audience and performer. Without the performer 'listening' to the audience, it just becomes too open-ended and ephemeral.