If I remember correctly you need 3 crystal webs<unstacked>, a small brick of vellium, 2 glass shards. Combine in pottery wheel then fire in kiln with a HQ firing sheet. Take the resulting vial and put it in the velium extractor with 2 small pieces of velium. Alla reports trivial at 130 for the vial.

Just do what everyone does. Make unfired medium bowls until they trivialize at 122. then you're gtg with Gate potions. Costs about 30pp (since dwarves and cha don't mix) and 1.5 hrs (since dwarves and int don't mix)