I manage a .7 to .83 kill to death between 3 characters. Ive played better lately but here is the real secret. Play control, contribute, earn 4 marks for losing and if your lucky 6 for winning. Make sure you grab the bounties you may get lucky and finish a few. I hate the crucible but have played over 800 matches. Above all else have fun while you are learning the maps. Some people just have the skill set to be great at crucible. I am not one of them so I stick to the have fun part and contribute.