My biggest issue with rituals is that they last for too long. If you cast it just as war begins, you will have it for the whole war in many cases. I'd say it should be 2 days maximum instead of 5. We started our war with barrier and I was considering which ritual to start next but there was no point considering barrier went on and on and on... Having to recast and choose different rituals at different parts of the war would create more strategic play.