Not sure how you would define 'mental trip' but for me, taking MDMA with LSD makes it better by more than an order of magnitude. If those two substances were one, it would be my favorite psychedelic. Only 5-MeO-DMT can compare. Certainly nothing is 'killed' in fact, I find everything far better. I have no desire to use LSD ever again without MDMA.
>LSA with mushrooms, gives you a sense
>of clarity and energy.
I did this when I was a kid. Ate the seeds, and about 8h later ate a couple grams. Basically this created some insane visuals but no 'trip.' I guess the seeds produce a very subtle, but powerful psychedelic state....and I was so far in it that by the time I ate the mushrooms, they really did not add anything (beyond the visual effect). Neat combination though. I would definitely be up for it again. I plan on working with morning glory again one day, though if I do it will be with authentic R. Corymbosa...and I'd definitely consider adding psilocybin after getting to know the virgin plant better (if she doesn't object of course).