The only way I see to actually fully fix that is to remove the "subs can only activate if the result is legally usable" rule, which would mean that those subs turn into Struggle instead of activating. However, that was the case in the past, and it would be worth looking at why that was changed in the first place (I don't actually remember the rationale) to see if the cure might be worse than the disease.
Either way, I think the rule Mow quoted should probably be removed. It's not really doing anything to help us deal with what it's supposed to, and outside of what it's supposed to deal with it seems like an arbitrary restriction that just blocks subs that really should be legal.
Either way, I think the rule Mow quoted should probably be removed. It's not really doing anything to help us deal with what it's supposed to, and outside of what it's supposed to deal with it seems like an arbitrary restriction that just blocks subs that really should be legal.