Board Thread:Questions and Answers/@comment-83.82.209.84-20150620195310/@comment-26471652-20150621010937

As for new unit, try to get a mitigator, you'll met a very thick wall in you progress if you don't own a mitigator.

Try to get on of these unit and treasure them:

Shera, Narza, Arron, or 7* Elimo