Brie or SB for converting into RB?
SB is usually a better choice, as it gets you a LOT more RB than brie would. But that’s only if you manage to buy it at no more than 700-800pp. Anything above that, and you won’t make a profit in the moz. If you can’t get reasonably priced SB, then you would make more of a profit in the moz by waiting in the lab for a ton of potions, and converting brie, because then you RB will only cost 500 gold per piece.