We change rituals alot. Sometimes 3 in a week. Depends on situation. Started age with expedient out of protection. Every war we run Godspeed but we are dryad and orc core. Eowcf is affluent and last 24 hours is expedient. Then we go Godspeed, expedient, Godspeed in a cycle until war comes. Someone gave us barely enough hostile points for a war 12 hours in expedient and we were able to change to Godspeed and declare on the 24th (took less than 8 hours to cast). They werent expecting that. If we do something great, its getting rituals completed in 24 hours or less.