Stuck on Level 177 in Super Farm heros

lorac

I am stuck and getting bored now with level 177 in Super Farm Heros...any tips? Also not sure how to get and use boosters. Have got this far not using any. 

Randle

Here´s how you can use your coins and get your free boosters to help you out on any level

https://www.youtube.com/watch?v=ZDTJuvNZPg8