i don't think it's really recommended to mix flytoad with anything else at all, the effects can be really overwhelming, in fact they don't have psychedelic effects at all but what you get is an (severe) intoxication, balanced between death & life. and as known, if someone is really, really sick & almost physically dying, one can experience some sort of enlightend, psychedelic thing.
that is, if you can obtain potent amanitas, like the ones that grow in the colder parts of the globe. I've done them once (i ate 2 of them), and went really sick in the begining, with a lot of vommit and pain and absolutely no happy feelings, but after a while i felt in a deep sleep with crazy dreams (nightmares?) for a long time. i'm not looking forward to do it over, but hey, everyone has to experience life him/herself to see if it works out. I've heard from people who had possitive experiences with them, but these individuals were involved in some shamanistic rituals, and maybe that's what was missing in my trip...dunno... anyway, good luck!