I dislike having to click a billion times with every single weapon except the Uzi... which I won't even get to because I'm not going to give myself Carpal Tunnel just trying to play this crappy game...
simple game tactics: to start only spend money to buy people until you have 4, then spend cash on wall hp and the villa, push your wall health to 100 and villa to 50% dmg bonus before the armored wave and you can win with even the weakest weapons
auto=shotgun: DocHoliday(5), Accuracy(10+), Reloading(10+) and an anti-armor mod. Strongest shotgun class: Nobel despite a lack of docholiday, it has both anti-armor & anti-air skills -- though I always end up using three rogues and a guardian...
Okay, aimed shot clearly halves your rate of fire giving you 70% dmg bonus in return, the hidden benefit is ammo conservation, more bang for the buck means you waste less time reloading