Lets Talk about assists. 
Everybody know that feel when you shoot down a enemy to nearly 1% Health and a mate finish him off with just 1 bullet.
IMO the Person who has done more than 50% Damage on the enemy should get the kill , and the other mate the assist then.
						
					
					
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	Or factor in assists into kd counting an assist as either 1/2 or 1/3 of a kill