i heard boiling shrooms will be weaker.... i get potent enough tea by just pouring a cup of tea that has been off boil for about 30 seconds... i heard that's about the right temperature to release the chemicals... then i squeeze the dried shrooms out of the tea. i don't even chop up the shrooms, i'll just pour the tea over the full dried shrooms... always seems to work and i don't feel like it's much of a potency loss compared to eating them. maybe with higher doses like the OP is describing, it might be weaker. i'd say an 1/8th in tea is a normal amount. that'll probably be some where as potent as 2.5-3grams if not the same trip as eating. i dunno i always hear tea is a certain amount weaker. eating shrooms isn't worth it imo. i've had some alright cracker dry shrooms, but mostly they are unbearable.
one time my friend made shroom tea and put a bunch of shrooms in a boiling pot for a few minutes. i didn't think it was gonna work, but i did trip. not sure if it was at the same intensity though.