For stability, the two poles should not be close to each others. If the first pole is at 600 MHz and the second is only double it, you will not have a sufficient phase margin. You should split them. A simple way to move the first pole inward (to lower frequency) so that you have a "real" dominant pole. Let us say fp1 is the dominant pole, this means unity gain frequency (UGF) is around DC_gain*fp1. fp2 should be around 4 times UGF to give you around 75 degree phase margin.