Actually, Yuma, if we go with Ash's hot potato strategy using a no-lynch, would we still no-lynch when someone doesn't die, or do we lynch that person? In the latter case, Mafia doesn't need to send bomb at all, which can be tracked, blocked, etc., and just let our lynch take care of their night kill.
Though maybe that's still better. That would be like regular Mafia where we choose no-lynch every day, except we vote on who the Mafia's night-kill is. Which was Ash's point in the first place.
In the case when we always no-lynch regardless, then... if Mafia never sends potato and just primes people.. they prime and build items.. we build protective items.. eventually we try to get an investigative result. We can make some protective abilities, which basically means Mafia will need to prime some players twice (not sure if they'll know if their prime failed or not), but on the other hand they know who to prime and we have to guess on who to protect. It's hard to visualize, but I think this is better for Mafia. At the very least, we're very ill-informed through most of the game.
PPE: Yuma answered, okay. I think I agree that that's better.
So basically your idea is: Use Ash's strategy. No lynch Day 1. Vote for person to get blown up each Day n, if they're alive on Day n+1, lynch them, else no lynch.