The easiest way I found, and the way I used, was to play through the game upgrading your combat abilities as you go. Then return to the level with Kraven and use the Amazing Charge Attack as frequently as possible. These early opponents tend to be weak and can be defeated with 1-2 charge attacks (usually 1 for gunners and 2 for hand-to-hand hunters). I had the achievement by the end of the sniping segment.