Board Thread:Questions and Answers/@comment-50.137.254.131-20130310043220/@comment-7463332-20131101194321

Ah, but to upgrade Attack Bunkers past level 9, you need to spend your higher value cores on an individual building! And Attack Bunkers are horribly slow. I must say, however, that we both have valuable suggestions, and combining the two is the best way to go.