Mafia: general discussions.

But in general, Yashur is right; I have personally learned that using percentage-based defenses always carries the risk of the game going awry. When it shouldn't, the defense will trigger; when it should, it won't. A strong team might unexpectedly receive an additional boost due to this randomness, leading to a one-sided victory and a lot of negativity...
Non-percentage-based defenses are better in this regard because they are completely predictable. If you don't plan something, don't take it into account, and it backfires, that's your problem; you should have thought it through better.