I may have a solution to the mana troubles and moon/bridge problems shortcake sometimes has. This is untested and might just be bad, but dropping a top and re-adding a looting may work. Obviously top is the more powerful card most of the time, but pitching dead cards, enabling welder earlier, and land digging might just be worth the small change.

I'd only recommend testing this for 2+ (probably 3) welder builds since a lot of the value would be lost otherwise. Thoughts?