I'd like to think I do pretty well in Crucible, and like everyone, was once terrible. I think it's commendable that you ask for tips as well, and I think you'll be quite proficient at it in time. I have a few pointers for ya, bud. 1. 2 guns are better than 1. Stick with a Guardian as often as possible. This is especially effective when you can communicate via Mic and coordinate objectives or team movement. 2. Your radar is a tool, not a crutch. Is it great that you have it? Yes. However, should your eye be glued on it for the majority of the match? No. Make your opponent look for you, not you them. When you see your radar light up, adjust to the direction of the red bar and be sure to be looking down your slights. 3. (Control only, optional) You don't necessarily have to do this, however I've gotten most First Blood medals this way. When in control, I always run for the middle flag. Chances are the majority of your team will capture the closest flag, so you can get an early start in capturing your second flag. I personally cover mid, NOT capturing it, while waiting for team reinforcements. This usually grants me a First Blood medal as finding the right angle for the appropriate map mid flag will allow you to flank unsuspecting opponents. 4. When it comes to heavy ammo, HOLD OFF FROM GRABBING IT AS LONG AS YOU POSSIBLY CAN until at least another Guardian is present with you. 2-4 Guardians with heavy ammo can do WAAAAY more damage than just one who might die in the fire focused on them for having heavy ammo in the first place. This is also a great opportunity to capture a flag if you're short one as you can easily clear a room with a well placed rocket or some MG rounds. Happy hunting, Guardian!