Set: turret, ranger, minigunner, farm, electroshocker.

 

1)Place 7 lvl 1 farms. Upgrade 1 farm to lvl 2

2)Place 1 lvl 0 minigunner

3)Place last farm and upgrade all farms to lvl 2

4)Upgrade minigunner to lvl 3

5)Place 2 lvl 3 minigunners and upgrade all farms to lvl 3

6) Place 2 lvl 3 ranger

7)Upgrade all farms to lvl 5

8)Place 8 more rangers and upgrade all rangers to max lvl

9)Sell farms and minigunners on wave 40

10)Upgrade the rest of rangers to lvl 5

11)Place 4 lvl 5 electroshockers

12)Place 5 lvl 5 turrets and 1 lvl 5 minigunner