SWIM tried already DMT with LSD, DMT with mescaline and DMT with mushrooms. With LSD he agrees with q21, it was quite weird.. It was as if the LSD kept SWIM grounded, so the DMT hyperspace couldnt 'take over' for him to fully enjoy. Sure there were visuals and so on, but it just didnt really feel so right. With mescaline was also kinda strange.
But... With mushrooms, its WOW WOW WOW! best combination EVER for SWIM. Its like, if dmt and mushrooms were musical chords/notes, they would be very harmonic. Not only is the pre-flight anxiety diminished, but the visuals are amazing, and not so hectic as with pure dmt, more detailed.. The come down was so smooth, one could incorporate everything so much better.. This is really a highly recommended combo in SWIM's opinion, smoking dmt after the peak of mushrooms