It seems like when I run Marshal, Phantom + Maneuverability + PF enhance, my energy drains when running around in stealth MUCH faster than without maneuverability. The difference seems to be about twice as fast as without. I know many people felt this combination in the beta was a bit too powerful but I was considering using maneuverability on my sub machine gun class until I realized how fast it runs out.

Any help would be appreciated!

Running does not run out your E-Bar only stealth and Armor (Drains a lot more when you run in both S mode and A mode)