After 9 seconds, Pigge will spawn. After the second Pigge, St. Pigge the 2nd will spawn, followed by more Pigges. The following cycle will repeat until you damage the base. Then when you deal enough damage, a Bore will spawn followed by another one later. After the first Bore, 2 St. Pigges and 2 Ginger Snaches will spawn.
Use Gentleman Bros if iCat is not available.
Save money and upgrade wallet a few times. ALWAYS have enough money for iCat in the beginning. When any type of Pigge nears the base summon some meatshields and iCat. Keep spawning iCat whenever you can and spawn a few meatshields. Once your wallet is at max level and have defeated all of the Pigges, summon everything you have. IMPORTANT! Remember to stack Catleys and iCats the most, it's important! Once the first Bore spawns you should have a stack of 10-15 iCats and Catleys, tons of meatshields and possibly an uber. iCat should keep the Bores frozen forever while Catley knocks them behind the base, allowing heavy hitters to finish the job, while the Bores aren't even dead! Very effective for fast, easy power.