How many truffles do we need to eat to trip balls?

We have tripped 3 times now (total 3 people, we all took the same dosage). First dosage was 7,5 grams, couple weeks later 12 grams and after that we went to 15 grams.

We bought truffles from Zamesnia called 'Valhalla' rated at 6 stars out of ouf 5. The strongest kind they sell. We sliced the truffles into small pieces, soaked them in fresh lemon juice for about 10 mins and then ate them.

Our first time was really amazing, I've never seriously laughed so much in my life before. The first trip was/felt the most intense for some reason.

The 12 and 15 gram trips were nice but rather uderwhelming. I personally experienced some mild(?) visuals like floating celling, ehnaced collors and could feel some sort of energy flowing through my body, this goes for all the trips we did.

We'd like to go to the next level now, so we were thinking about eating 30 grams each? I've read through some older threads and didn't get any smarter, lots of mixed responses. Could someone expirenced share his/her thoughts on the matter?