[Cantare] has an interesting mechanic where we want to empty the magazine as fast as possible as many times as possible. This is because, when the projectiles come back, they are guaranteed red crits. To achieve this, we boost fire rate and reload speed to the moon. Merciless is mainly for that reload speed. Punch through is also critical, as it allows the returning projectiles to hit more enemies. We don't care about critical chance at all, because the returning projectiles have a flat critical chance, but critical damage is very important. Empty slot for [Merciless Gunfight]