Yet we find six....
However I will admit that's a gameplay number, but I doubt they are meant to represent several hundred. We only ever encounter one more living mage who is clearly not representative of hundreds
And how many living mages do we encounter at all, including mage Origin? Yet the circle obviously must house a couple hundreds mages at least, unless we assume that 90% are apostates...
Frankly, those gameplay compressions give me a headake when I try to somehow put the pieces together, but I guess it's unavoidable if the game is supposed to let you wander around any castle, town, city or village :/
And admittedly, consistency is sometimes... disputable at best. I once looked at map of Denerim and tried to guess how many elves actually lived in the Alienage (based on canonical total) - seems like it has to be a couple thousands, yet it's implied as if the elder pretty much knows everyone... Games and numbers don't go too well hand in hand. :/