I don't believe a Knowledge Devotion-style of FE has been more than passingly mentioned. Anybody have thoughts on how well that would work?

I'm inclined to think that the basic idea of "knows a lot about a lot of creatures, can fight more effectively against any specifically identified" should neatly fulfill the "monster hunter" aspect, and without being locked down to a narrow niche either.

However, I do also like the idea of packages that would usually work well against a particular set of foes, but have other uses as well (such as the suggested Evasion + Grounding for dragonslaying).