I was looking for infos about tactics using by helo crews in combat. This is what I find on military.com:
1. Alter any takeoff and landing directions from known or predictable helipads.
2. Never fly a predictable or constant schedule, route, course, altitude, "race-track" or other any other identifiable or easily predictable flight path. That includes constant hovering positions, including "nap-of-the-earth" flight.
3. Never follow a predictable altitude or route, including rivers, canyons, streets or roads, for any length of time.
4. Evade any population centers, such as a town or village.
5. If these rules must be compromised, arrange for effective fighter cover and rescue capability.
6. In multi-ship missions, allow at least 500 meters between aircraft, so as to allow all aircraft room to maneuver without risking collision or restriction of defensive gunnery. That includes the basic airmanship of always turning, so as to view a clear spot, whether climbing, descending or staying level.
Vary any insertion or extraction tactics as well as those of support aircraft and their stand-off defensive coverage.
7. Be aware that helicopters have no significant surprise element, given their speed and noise. Thus, pilots must be aware that going into an unprepared LZ is extremely dangerous. This is especially true if the LZ presents itself as a predictable insertion point, particularly if a "pathfinder" is not used. One landmine can destroy a helicopter and its mission.
8. Be certain during night operations that a minimum of light from the ground - as simple as a trash-fire barrel - will illuminate the rotor blades, marking the helicopter as an easy target.
9. Never fly a mission without overwhelming firepower in immediate reserve, whether artillery or air cover. That includes rescue capability.
source
May a gunship helicopter idea die soon then?