Cheap and very long range artillery.
Offense: Like most artillery keep behind a wall of units to provide support fire. It doesn't pack too much of a punch though it does do area damage and its range is very good for such a cheap unit.
Defense: Attack with helicopters or rush it with tanks as it doesn't have too much health and is fairly easy to destroy. Just don't let it get behind a wall of units otherwise it will be able to pound you since there aren't many units with its range.
Variant Specialty Edit
This is the cheapest variant of the UR Chiron. It has the base stats