the only extreme maneuvers you should be making(unless you are fucking around) should be STRICTLY evasive......Your job is to be a steady platform for your gunner, all the while keeping the gunner alive and killing shit. Hang back and work your way forward across the battlefield. Communication plays a majour role with a solid crew.
1-Dont charge in and be the front lines...as CAS, it is your job to SUPPORT the front lines.
2-Be patient and prioritize your targets.
3-Know how your chopper handles at different speeds and altitudes. (thus evolving your "extreme maneuvers")
4-Until you become proficient with situational awareness in the skies(in a helo) dont be afraid to hang out near friendly AA assets=D!
if you can manage those pointers, your survuvability will go up...oh yea, DONT show your ass to enemy choppers, learn to maneuver backwards.(see tip 3)