Precision airstrike probably depends somewhat on the map. And it helps if you have a friendly UAV to show you the concentrations of people. The fact that you can target the angle of the bombing run makes it pretty decent for taking out an entire street. I guess it's all a crapshoot. You will get a couple of kills out of an airstrike if you plan it right, but if the enemy is set up to counter a harrier it'll be shot down before it does any damage. If Pave Low isn't glitched anymore then maybe I'll go Pave Low, Chopper Gunner, Nuke. The first 9 kills are kind of tough. But after that...Precision Airstrike sucks. You have to know your target's exact location to have a chance in hell of killing anyone. I rarely get more than one kill. But-I run predator/precision/harrier just so I can nail the guys that come out of cover after the precision strike. They usually figure it's over and safe to walk the streets again...suckers.
I'll have to get back to trying for the nuke soon. Last time I played I did the Akimbo 1887 thing in FFA. I don't know if it's really that overpowered. Maybe it doesn't suit my play style, I don't like the idea of seeing someone in the distance and not being able to make a tough headshot for the kill, switching weapons is a bit too slow. Or maybe I just need to work up to the pro version of Lightweight for the 'quick aim'. Seems like that might be the part that makes it incredibly cheap.