The ratio changed when Umbridge became Defense Against the Dark Arts professor in OP- but only until Dumbledore brought in Firenze after the sacking of Trelawney.

• 在《凤凰社》里，这个平衡因乌姆里奇担任黑魔法防御术教师而偏斜－但等邓布利多在特里劳妮被辞之后让费伦泽教占卜课时，这个平衡又恢复了。