As broken as the battalion is, dang was it fun to read. The Vital Strikes rule did give me a idea for one though. Shadows of Sotek (80)...
I would go with warriors as their the other aggressive choice of troops and can support the knights, but the astrolith won't do much for either...
I had a bit of an idea for one like the Wargrove Battalions from the Sylvaneth battletome with their whole require one battalion with extra...