this thread might also be useful
it has discussion of classes that you should not edit, aside form that what other people have said is true I do highly recommend planning out all classes you need and cutting what you won’t use.
Classes like Wyvern rider, Wyvern Knight, Wyvern Lord, Knight, General, and Great Knight are very easy to make unisex due to overlapping animations and the female tag being able to be set in unit screen like in vanilla.