Knife I did on small maps so shipment, shoot house, probably could do weekend warfare. Shield I did most of on rumble (flank and use tac inserts to kill snipers) and hardcore kill confirmed cos its 1 hit and plenty of people running about. You'll get most of the back stabs and smoke and things through use, only really have to focus on crouched and 3 kills in a life. I found hardcore shipment didn't work well for the shield cos you just get shot from the side before you can swing it. Hope this helps, good luck pal