I'd like to recommend enabling a DZAI air patrol, or possibly two. However, customize it so that it spawns only an armed Mi17, and not the default Huey. (I haven't tried any other heli classes, but they should conceivably also work. I just recommend using well-armored craft so that they aren't pushovers.) The Huey drops like a fly to even a small amount of LMG or HPR fire, but the Mi17 is well armored and not just an easy turkey shoot, though vehicle weapons or sustained LMG fire will still take it down. Upon death, 2-3 crew also parachute down, though they do not always survive.
Sample values for dzai_config.sqf:
DZAI_maxHeliPatrols = 1; // or 2, not sure I'd recommend more than that DZAI_heliList = [ ["Mi17_DZ",10] ]; DZAI_heliUnitLevel = 3; DZAI_heliGunnerUnits = 3; // earlier in config file DZAI_heliReinforceChance = 0.50;
A heli patrol was quite a challenge on my own server, and I think it will supplement the challenge well for the MoonGamers server. They may even be configured to reroute and provide air support to ground DZAI spawns, which I also recommend though you can lower the chances to taste.