Age 72 and before you got an attack times reduction of 20%. So after some hours in war you had 12*0.8=9.6h attack time. If you sync yourself with your kingdommates in a 12h attack rhythm, you can choose +2h for 5-8% gains (I think) and yout troops are back right after an tick, if you attack at x:30 hours. This means that you can raze your stables and rather easily calculate and manage your attack times in a way that keeps your horses out in the field from one tick to the next.
Acres and BE fluctuations makes it really hard sometimes to do something similar with barracks.