By 2084 there should not be any more piloted interceptor aircraft, even now they say the F-22 is probably the last manned fighter produced by an advanced technology nation. The interceptor pilots, if there are any, should just stay on the ground and fly the planes by remote control.
And if the aliens land, there should not be the need to send Phalanx troops to kill them, they should just be bombed by something like the Predator drone. Ground troops should only be used where this is not practical because the drones may cause civilian casualties which affects country happiness.
Also during ground missions, the Phalanx operatives should have access to small recon drones which they can launch to see over obstacles and spot aliens.
And the aliens themselves should also have robot drones, and more advanced guided weapons that can go round corners and navigate a complex path to the target, like the alien blaster in UFO/XCOM.
