Exact Time: 6m19s783ms

Inspired by @MathgodpiExtras's tactics in his world record video. Optimized some details. This is so far the hardest of hardest to challenge. Took me 100+ plays.... seriously lol

Secret found:

The top left corner GDI base will not trigger production as long as you don't touch or being attacked by their main base. Very interesting trigger condition I found. (and yes I tripped the production many times while moving one flame tank to the top right corner.)