As far the specific dosage for shrooms i didnt get this recomended dosage from the internet i was fortunate enough to get a hold of a guy that sold shrooms called GOLDEN TOPS and i told him i didnt want these for recreational use i wanted them for clusters and it just so happened that he had another customer he was dealing with on a regular basis that also suffered suffered from ch . He told me that person was taking that specific dosage every 4 days and said on the first dosage you take you start with a higher dosage of between 1 and 1.5 grams to start with then start micro dosing 0.4 grams every 4 days after that so you dont feel the affect and can still function without the sphycadellic affect from the shrooms.What is important to mention when using shrooms and this is also stated in one of Bob Wolds videos that you must stop taking all of the medications you are currently on as he states that the medications interfere with how the mushrooms work in your brains receptors.As for your first question i took shrooms over a period of 5 months and found it more affective than any other medication i had tried.The problem with most medications we take all seem to be abortive treatments once the ch attack has occured but very little on preventative medicines to stop the attacks from even occuring in the first place ,thats where the shrooms were the better alternative.Once i went onto CBD oil called Humacology wich is a broad spectrum oil that contains 0thc,270mgCBD,60mgCBG,10mgCBN with a very low dosage of 0.2mg under the tongue twice a day for iits inflammitory properties ,chronic pain releif my clusters have completly disapeared so i am completely free of all other medications,sumatriptan,verapamil,imgality,and also no longer take the mushrooms.