Yes receiver packs could help. Also a stutter stopper like they make for the Spektrum system.
The 7700 likes power. If you have a buddy that has a lipo you might want to try that just to see how it acts.
I dont have access to a lipo so I think the next thing to try is a receiver pack while looking into seeing if they make some kind of a stutter stopper for the Mamba.
But I run into another question.I think I can hook up a receiver pack correctly with a brushed ESC knowing what wire is what using the colored wire coatings.Black-Red+White receiver.But with this brushless system the wires that go to the receiver are Brown,Yellow and Red. which 2 wires do i disconnect before I can use a receiver pack?