in my opinion, sashes should be able to pay to prevent loss BEFORE they have to pay out to the opposing sash... for example, if a tier one loses to a tier two they would normally pay 2 yen. if the tier 1 has 3 yen, they pay 2 to avoid loss and pay the remaining 1 to the other sash... that's how i think it should go...
otherwise sashes have very little insurance against losing tiers