Ghost Recon Wildlands (GRW) El Sueno Mission Ghost mode Extreme Difficulty

Because of permadeath in ghost mode, I devised a strategy that minimizes engagement. I started with my chopper on top of the hill because if it's by the starting point they spawn Apaches to destroy it. I'd rather deal with the two enemy choppers when I'm by the SAM than when I'm the top with enemy tangos. As long as you have time left, take out as many tangos as possible so you don't have to deal with them later. You can take your chopper back down the same way.
Thanks Ubisoft for adding ghost mode - it added new life to the game. You have to devise a new strategy to complete.