Objective: Survive 16 waves
Focus towers are the key to completing this level. You’re main enemy in this level is going to be the squids. The squids freeze nearby towers when hit so you’ll need a number of focus towers spaced out throughout the level so you’ll still be able to attack even if some of your towers are frozen.
Start by building focus towers in a “stair” formation.
I also built a scout tower at the top. You may need this in the early levels should your focus towers be frozen out.
Keep building focus towers. Try and spread them out a little
The longer a focus tower zaps an enemy, then the more damage it inflicts. By building lots of focus towers you’ll be able to have them target the enemies on the final wave.