my guitar, contact mics, etc, gather in a mixing board with digital delay/loopers on the two sends. i bring each looper send (100% wet) back to it's own channel on the mixing board which lets me send the contents of one looper to the other and vice versa. the mixer then sends a mono signal of this through a few stomp boxes, a final looper, and into the amp. works great for me. this approach basically requires a dub-style of mixing/thinking/playing, though dub does not have to be the resulting sound. b.