Longbow, Spike-ER, Spike-NLOS and other over the horizon ways of hitting for attack helicopter are all fine and dandy to get its engagement range above SHORAD... but when you have to suffer the price and complexity of full on over the horizon weapons, why have them on an expensive, specialized attack helicopter? At this point it's just yet another missile bus. Other helicopters, drones, even stealth jets can deliver similar ones, cheaper and/or better. You can get a F-35 or 4 Reapers for the price of 2 Apaches and may well get more use out of that.