- When the base reaches 99% HP:
Since no enemies spawn at all prior to base hit, you can use this to your advantage and max out your Worker Cat and Wallet. When you hit the base, lure both the Shy Boy & Cyberface to your base, and send a Cat right before they reach your base. The moment that cat dies and Cyberface's wave has passed the back of your base, send in a 100% Critter, preferably one with a short attack Animation such as Sunny Neneko, but others can work too. After that, get the Shy Boy off your base immediately via Breakerblast and stall him with meatshields while draining his health. After Shy Boy dies, it's just meatshield & chip away at the remaining enemies.