I've established, for regular invasion, that being an elite sucks. Even with elites moving faster and having more health, I found defending was much to easy. Even if they make it to past the second area, the scorpion dominates with the lack of weapons to take it out with.
The barrel roll is unresponsive most of the time, taking several taps to even make it do one, and the animation is a little shoddy. The banshee bomb is beast.