I'm convinced the higher the combat rating is the better, but if k/d is a factor then it can't be the only factor; I have. 2.04 k/d and I have multiple friends in the 1.5-1.7 range that have higher CR than I do. Score is probably another factor but what about Win/Loss ratio? If W/L ratio is a factor then how is that accurate when combined with Rumble? In Rumble you only have a 1/6 chance of winning where as in every other mode your chance is 50/50 or 1 out of 2 - there's only 2 teams therefore two rankings but in Rumble there's 6 (1 for each player). I've been also wondering if completing matches (not quitting) is factored in somehow... I recently misunderstood a bounty objective where you needed to get a 25-1 k/d ratio so I was quitting out a lot and noticed my CR dropped a bit, however this could've have been due to multiple other things I was doing... We need clarification from Bungie. Period. I don't see any good reason for not explaining how something like this works, makes no sense.