strategies for boss fights on hardcore? the only boss fights that really give me trouble is berkins 1st phase and 2nd phase, 1st phase i try knifing as much as i can and then back up and shoot him till hes stunned and knife again, is that strategy good or is there a better one, for his 2nd phase i always try doing enough damage so itll only take one crate slam to beat him, thanks for the help