I’ve found for “ME” half an 8th is like cool good time but I’m still kinda in control, a whole 8th and I’m pretty gone. I once did 14 grams of magic mushrooms, had absolutely no control and a horrendous trip at a rave in Oakland.
I don’t think I need more than 5 grams ever.....and that’s only like when I need to talk to god because last time I did 5 grams we had a long talk and I got stuck inside of a huge granite rock for hours until my brother touched me thus expelling me from the rock.... It was a crazy experience, I literally became the rock dude.
As for tolerance, I’ve done like half an 1/8 then a full eighth a few days later because I was thinking tolerance and still tripped harder than I expected.
Personally I like to wait a month or two before tripping again. Kinda spiritual and a release for me, when I need to “get away” and “reset”.