Board Thread:Questions and Answers/@comment-24244308-20131207103815/@comment-4580263-20140115104003

Because 1/0 will NOT hit the MOAB, but hit other bloons instead. 0/1 makes sure that it always hits the MOAB. This is because 1/0 can only hit 1 bloon but a 0/1 can hit 3 bloons and it even shoots faster. Also, I think the MOAB is too big to get the accuracy upgrade. Sometimes you want 2/1, but not when you cant afford it.