Well currently shields are too too cost effective. For 4 scoops they protect you against every type of card. In contrast bumholes can destroy 10 scoops but they can only target the scoop leader and only when you have 3 or fewer cards. The result is that you tend to rely on shotguns and destroyers to break other people’s shieldwalls. Even if you stock up on them it’s unlikely you can break an effective shield wall at the end. Thus it comes down to who has the most modests and a reasonable number of shields at the last.

I’m not saying that scully’s idea is a great one but it would make turtling less desireable as a strategy.

Another option would be to reduce the chances of getting either bumhole or shield cards by a significant number. Maybe something like a 5% chance of getting either?