I seen this guide after doing a test run and making an adjustment , Annie is a 3 round battle when done with the right powers. The big guns, scratch and alternate regroup to counter the bomb damage incoming for the first too turns. Even a buck or witch can use 2 big gun cards off gear its not very difficult using fort is wasting time kill the back row that bomb first and your problem is gone. I don't even farm this and figured this out quiet quickly.