Hey, I just had this idea for a unit, either for Patriot or Phantom. It would have a very light main attack, fast speed, and low health and defense. However, it's ability is that it would be able to plant mines in the ground that explode when an enemy ground unit crosses over it's range, dealing high damage and/or stunning or hindering the units within range.
As I had said, this would most likely be either a Patriot or Phantom unit, or possibly both, considering that this would most likely be used defensively or stealthily. I try to balance it by making the unit easy to kill, with almost no other attack. Also to balance it, the mines would have to take some time to become live, therefore making it harder to use on an offensive front. What do you all think?