This distraction technique means that in the early stages of the map (less than 10 tanks) you can have the top side defended by 4-6 tanks (and initial free MM) while bottom only requires 2-3 tanks. Always use the laser to destroy every Immortal // Archon // Colossus but nothing else.
And after some time (can't seriously remember) be sure that you have about 4 or more missile turrets hugging your tanks on each side and then add more next to the laser drill and into other dropship hold position locations later on. I even had to run off my tanks on the first air attack just to make sure they don't get picked because my turrets were kinda mispositioned and didn't soak the damage away from the tanks fast enough (but it got fixed later on and I had a ton of tanks to spare).
TL;DR:
1. Make superfast economy with expansion
2. Build only tanks as your units
3. Use Laser to destroy hard-to-kill targets
4. Take care of air attacks with Missile Turrets (and laser if needed)
5. Only northside requires "normal" defending (but make sure you can kill the southern entrance units in time)
6. Do not build anything outside of the cliffarea except CC & two gas unless you feel lucky ;p