Ghosts are the so called “spy” bots. With its cloak and stealth abilities combined it remains totally invisible for your enemy unless he has built an intrusion countermeasure system.
Use it to sneak into bases and get intel on what is going on there, so you can be a step ahead. On top of that, when self-destructed the Ghost delivers an EMP explosion with a large radius which can paralyse enemy units for up to 45 seconds.
Use its self-destruct EMP to disable enemy anti-nukes and strike with your nukes » ICBMs.
It also finds great use in combination with any artillery units. put it in front of an enemy’s army to gain perfect vision and perfect aim for your artillery.
Also unique is their ability to reclaim, so you can dismantle unguarded structures