I like the idea of knowledge skills really helping in combat. How about a team work feat for that?
Shared Knowledge [Teamwork]
You know how to direct a fight and get your friends into the fray.
Prerequisite: Knowledge is Power
Benefit: You can make the same check as the Knowledge is Power feat with the change that the benefits are for every 10 you beat the check by. Every friendly creature in a 30 feet radius gain the benefits of your new Knowledge is Power feat. Whatever benefit you choose, all creature gain those bonuses.