Yes, you can dynamically switch between rulesets, but I would also recommend trying out my suggestions at the end of the previous post (limit numbers to 72, get rid of the plural word variations, and change OneOfTheseCanBeSaidOnce to OneOfTheseWillBeSaidOnce) and see if it ends up with few enough combinations to work. I think that should reduce the ~800 combinations to ~200 which might be small enough to work without a notable impact on the usability of the grammars.