Knowledge (tactics) [a minor boost for fighters]

[Jon_Dahl]

I like it. Give you the knowledge you need to actually fight the thing. The hand signals are a nice touch as well.

Looking over things, I think a total of three (or four) classes would have this:

Fighter
Marshal
Factotum (As they get everything)
(And an Expert, if they take it as one of their skills)

Thank you, I'll edit the OP and add those two classes.