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1. Keep moving 2. Be unpredictable 3. If you are going to camp, don't stay there too long, change your spots frequently 4. Stay out of line of fire 5. If you have like less than 20HP left, just try to pick off ppl at a distance so at least you can get a kill or 2 before dying.
That pretty much says it all, except if you have less than 20hp I would folow a team mate but not too close only because if they get killed you can still have a chance at killing them, and two people vs one is much better. Now on fireteam, have someone else take point when you have low HP.
