There seems to be two level ranges of mages at Najena. Some in the crystal room and her locked room are higher than those lurking in corridors. Indeed there maybe further granularity between crystal and locked rooms.
As a side note, it's been really difficult resisting the temptation of adding a 'gather a few dozen of your friends to kill a certain mob in ToV' entry to the guide as a friendly dig against our most esteemed OP
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