Very interesting browsing your eagletree file. I made a quick sum up graph while zooming into 1 minute of your run (mostly speed runs):
Virusss, do you know your overall gearing? Which pinion size do you run? Judging from rpm and voltage level i suppose you run a Neu 2215 2.5Y (600kv), is this correct?
With 5000mAh and a more constant / agressive power use (especially when running higher output batteries) i would expect runtimes to drop below 10 minutes (more then 500mAh per minute) and an average power of 1KW. You might want to get higher capacity batteries.