earn gold during goblin event

Plz can anyone tell me what should I do to earn gold?
Right now I have 35 tokens with my warrior , 3 lock goblin crates , altar relic recipe
And with my mage I don't remember how many toknes i got to be true
But i got altar relic recipe nd altar relic
Wht i am thinking is to buy at least 2 (maybe 4) ironbite's eggs and store them and also maybe craft more goblin locks what should I do?
Also i would like to know which is the best place farm free portals (need advice from a person who has tried him/her self)
Ty all :)