mushrooms + ketamine was deep and immersive; it felt like instead of the highway, i took the scenic route which allowed me to really assess all the strange thoughts and observe all the little details of the visuals. i don't remember the dosage.
4-aco-dpt and o-pce (iirc) got me VERY deep. not sure about visuals (i also am unable to get very visual anymore), but the ego dissolution and the feeling that the world was slipping away... that came up very easily.
now that i think back, there was a time i took o-pce, phenibut, and 4-aco-dpt and it felt like the world would shake apart. the windows were really moving, i guess i can get visual effects when i mix things but psychedelics alone? nope, not typically anymore.
there were a few other times i mixed, i guess the general synopsis would be that the trips get deeper and the emotional effects are muted more but the ego dissolution is almost forced out by the dissociative.
with weed in the mix, it's probably the farthest out there i've been while able to walk (besides dmt)