Well I'm glad others chimed in before I did because I'd say 100mg-200mg of 60x would be a good dose.
But then by good dose I mean what Solipsis refers to as being "hit, as if by a baseball bat". Instant teleportation to another dimension with no memory of who or what you are, no concept of time (and I do mean NO concept of time, a heavy trip will feel, on the come-down, like having lived hundreds of years as an entirely different, semi- sentient entity in another dimension), and just the most unreal experience you could possibly have.......