The hardest elite drones are those ones that fly right-to-left on the screen. No shadow warning, very small on-screen path, near-impossible to pull the screen to see far enough to the left for a second chance at hitting it.
On another note, sometimes I am tempted to think the game secretly has access to my camera and knows when I am paying less attention so that it can send me elite drones then. But I know this is unreasonable.
Developer really needs to disable the housing and silo clicking when there is an elite drone on screen, because too many times they get in the way (and I know I have clicked on the drone, but it detects me trying to click on the building)
I've found the dragging method DOES NOT WORK if it moves the screen (say you're trying to drag to the offscreen area to hit a drone belatedly), primarily if it's an Elite Drone. It can only be tapped while in the viewing area the screen was initially in when it first appeared.