One thing that is evident from replies is this - Don't be afraid to disengage or switch targets. If you're in a turning battle with a scout up close, but you see a team mate engaged with someone else at medium range, don't be afraid to suddenly break off and try to assist and burst down the enemy, which then gives you a wingman. This isn't a 1v1 game mode. Don't get tunnel visioned.
Also, always take a close range weapon. Whether it be clusters, light-lasers, rapid-fire, ions. Strikes are flexible, and if you do not maintain that flexibility as you upgrade, you'll be feeling the burn of enemy blaster fire.