Not to dicksize, but when you combine enough psychedelic drugs, the more drugs the more intense it will be. For example, on one particular festival I attended I consumed 7 grams of cubensis, three hits of ~150ug blotter acid, 25mg of 5-MeO-DiPT, 8mg of 2C-D, 12mg of 2C-T-21, 1 'hit' (no clue on the dosage) of MDA and finally, 3 hits of molly that had to be around 90mg per capsule, with plenty of pot and nitrous as icing on this insane cake I'd baked for myself.
I'm not lying, it was the most intense ride I have ever ever had in all my experiences with drugs. At one point my entire visionary scope was a hallucination; I had no concept of sight in the realistic sense.... grass appeared to be taller than I was, and the sky was a prolific net of neon strips of ecstatic energy, pervasive to the entire universe.
I guess the most intense drug experience is all subjective,really depending on the person, so I offered my own personal zenith of psychedelia. I repeat that I''m not bragging about the quantity of drugs consumed; hell, if anything I should be ashamed because it was, in retrospect and for all intensive purposes, quite enjoyable but way overkill.
YMMV. Peace.