I found that the easiest place to get this achievement on was Financial District
. When Pingers are dropped on maps, generally they can't climb over any ledges or anything of the like, so the paths they take are pretty linear. Financial District is a fairly tight map, which makes it simple enough.
Stay in the middle part on Financial District, and when the Pinger is dropped, get close to the nearest ledge and go into cloak mode. You can pretty much just walk right on top of it on that map. Make sure you're facing the cockpit, and click "X" and this will pop the achievement immediately.RECOMMENDATION
: If you get this achievement, it is 1/3 of the following:
The The Specialist achievement in Crysis 3 worth 135 pointsGet a stealth kill, a rip and throw kill and an air stomp kill in the same match (Public Match only)
This part of that achievement is the toughest to get, so work on it as soon as you get the rip & throw kill from hijacking the Pinger.