My times before the patch were very similar to what you are describing. Because of this thread, I ran one quickly here this morning which took 9:09 so quite an increase over what I had been at. One run does not an average make so I hope that was just an anomaly. FWIW, the final namer seemed no different to me. If anything, on average I would say it was the trash that took a bit longer than the named encounters. I totally agree with you about the Fist icon ability.
Knowing what mobs you can skip is critical to getting a good time. Focus on the droags to open the first teleporter. No one should run out of power on the last boss. Don't spam buffs that last far longer than their reuse comes up thanks to the buff from the 3rd named. For the last boss, keep the buff that protects against storms up, make sure double cast is up, and spam your thunderstruck and heal. Dead mob with 30-40% power left. My best time on infiltrator is 6:47 but I don't run it much since I already have my gloves/pants/ring maxed out.
