And to Jablestein,
Your AOE is fine except I normally finish them off using Tracer Missile since it does more damage and uses much less heat than Missile Blast. I have never really used Missile Blast since the heat cost is way too high for such a weak move.
And for your normal rotation against a single enemy
Tracer Missile x3 to stack debuff, Heatseeker Missiles when you finally get it, Unload if it has procured, Tracer Missile x2 to get the last 2 Tracer Locks, Rail Shot. After that, keep using Tracer Missile to gain Tracer Locks and use Heatseeker Missiles and Unload every time it procures.
I never use Power Shot because Tracer Missile gives you Tracer Locks and Barrage while venting heat when it crits.