I've experienced your desired effect from 25i-NBOMe, DOC+Ketamine, and 2c-E/2c-I. This is a pretty odd effect of psychedelics to recognize, in my case, but those specific drugs mentioned gave me a completely immersed experience, where most of my perception is unified in regards to my senses. The doses were something like this...
25i-NBOMe = 3mg
DOC+Ketamine = 3mg+100mg
2c-E/2c-I = 30mg/60mg+
2c-E would have a very warm spot in my heart if it wasn't so damn uncomfortable for me. 2c-I and 25i-NBOMe both follow this same trend. 25i-NBOMe is the most intense psychedelic phenthylamine I have experienced at this point as far as sensory-effects are concerned, though I can't really bring myself to do it, though I could mostly blame this on not being able to experiences dosages smaller than 2-3mg, mostly because of the hassle and lengthy process it would take to find my sweet spot for it. At the same time, higher doses might make it a better chemical too. I can't say for sure, though. Before I begin rambling on way too much while simultaneously drifting off topic....yeah...those RC's might be worth investigating in (in combination, too) your quest.