Fun game! :) I used the best primary weapon I could buy for each level as well as the shield (never used the decoy), near the end I started adding the dmg and rate of fire boosters. For the last wave of the last campaign, I had to add the both the drones (bomb and the ones with the gun) Never once used the reserve slots or even all of the available slots, except for the last wave of the 6th campaign...
 "StormWinds: The Lost Campaigns"){kind=icon}
 "Pandemic 2"){kind=icon}
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 "Bible Fight"){kind=icon}
 "Tactical Assassin 2"){kind=icon}
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 "Protector: Reclaiming the Throne"){kind=icon}