First the combo sounds lovely, second psychedelic combos are rarely fun they are usually more confusing than anything, a drug trying to take over the other. But with those two sisters I think it would be the pure bliss of psychedelic euphoria of the 4-HO-MET with the profound and disturbing spiritual effect of shrooms. The combination of 2 Phenethylamine would result in HIGH vasoconstrition which is unpleasent.
Second, arent amphetamine based Hallucinogens more stimulating? like more intense racing thoughts,anxiety, restlessness and insomnia.. Mabe due to higher selectivity towards dopamine/adrenaline receptors? I personnaly have more experianced with tryps and natural lysegic acid dervatives (LSA,LSH) because the only amph Hallucinogen ive tried is 1.25mg 25B-nBOME. Even tho my experiance with amph based psych is low I can tell that the nBOME experiance was CLEARLY more stimulating, BIG panic attack, then 16 hours of restlessness, muscle tightness, insomnia, which I did not find even trying High doses of Indole RC.(4-AcO-DMT and 4-HO-MET 35mg each not at the same time). I'm not saying Amphetamine base lead to stimulating effect but mabe it's linked to a higher affinity towards dopamine/adrenaline receptor which therefore lead to usual more stimulating effect.
Reason I dont play with amphetamine based Hallucinogens is that they are usually less safe, more physically uncomfortable and lot more confusing. As for the nBOME serie i'd recommend not to touch any of those until we know more about those chemicals truely there is something wrong with that kind of molecule i dont know what but damn.