I want to know what's the minimum firepower needed to kill the flying bosses and where is perfect placement. I leave two gaps across the top and direct the left side up to the same gap and slowly build a column with 3,4,5 Squirters in that column. Around the center area on the left, center, and right I have the Swarm towers. If all of the Squirters are max (Typhoon tower), the center Swarm is max, and the left and right swarms are 3 I usually kill both flying bosses.