If you want to get through it easy, play the whole thing on 1 star, repeat the whole thing at 2 stars then go through it at 3 stars, Upgrade Healing, Unit Cost Reduction, attack, defense, hpr, all that stuff after, easy routine and be very aggressive with your plants/cash.
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 "IndestructoTank! AE"){kind=icon}
 "Balloon Invasion"){kind=icon}
 "Four Second Frenzy"){kind=icon}
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