There are so many different variables, honestly. If you Google for a shroom dosage chart, that only applies to the first dose. Everything else after that first dose is just a bag of unknowns.

Between 2.5g and 3g is a moderate to heavy dose, usually. Once you get into the 4.5g or more, you start to get into breakthrough territory. I grow shrooms and eat them quite often and a breakthrough dose is intense, even for me. (I have had in upwards of 15g or more over the course of eight hours or so, as dosages can be managed, but there is a catch.)

With someone who is experienced, 5g over the course of an hour is a decent pace. If you know your trips, you can stretch out the peaks a little longer that way. However, it's a game of diminishing returns just because how serotonin receptors get saturated.

If I am going for a long trip, I'll just about double-down about half way through the initial trip. If I start at 2g, I'll take 4g a couple hours in as that is about the only way to stay at the same intensity level. Like I mentioned before, once the serotonin receptors start to get saturated it takes larger and larger doses to feel anything more.

It gets expensive and wasteful, IMHO. I have found that it's more effective to plan the first dose around how high I want that initial peak. Everything after that is usually less intense and just extends the "after glow", not the actual trip.

It's a weird game, TBH. You just have to know your own body and nothing anyone says here really applies. That absolutely includes me trying to compare my own experiences. Mushrooms are just hard to dose, s'all.

I have had a bad trip at 3.5g, and life changing experiences at 2.5g. +5g is where my visual acuity is completely destroyed and I just lay in bed because I am stuck in geometric jail. It's such a person-to-person and trip-to-trip experience.