I've got an idea of creating some religious military orders... with buildings such as Berserker Hall, Crusader Chapterhouse and Ghazi Fraternity... they would allow production of Berserkers, Crusader Foot Knights and Knights, and Ghazi Warriors in turn, depending upon religion, and the civic Holy War.
One effect I'd likely add to these is an anti-war weariness factor.
First, of course, I'll be updating my scenarios.
I've not had time in the last few weeks to work on this, but once I start, I expect it'll take only a matter of days to produce.