Where Satellites Go To Die

Where Satellites Go To Die is the fourth main challenge in Commander's Challenge.
==Overview==
Enemy Strategy: Mass Mortar Cycles and taking Oil Derricks
Other Notes: Orbital Drops are constantly used in the middle of the map.
A good air force or naval artillery is good for this mission, as they're not affected by the Orbital Drops. Also prefer Guardian tanks over Multigunner Turrets here (use them for defense only).
Tricky way to get under par time: Use Empire of the Rising Sun and Dojo rush. Spam wave force artillery protected by 4 King Onis.