I have the impression that someone forgot that ROFL is an instance that should be done in GEORG's old inventory. I can't imagine a new guild with -30% doing this instance in this inventory (for mages -50%)
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besides, I think class balance is a financial leap to get people to make several sets of items. The balance of the character is dealt with by a person who does not play and I have the impression that he does it with the use of "stone, paper, scissors"