Today I got the mission "Death From Above" from Martin Madrazo. In said mission Martin suggests I parachute into the given location. So, I started the mission, called Pegasus for my chopper, flew over to the mansion, and parachuted down. I was dead before I got anywhere close to the ground, as the guards seem a bit trigger happy.
So the retarded strategy that Martin suggests aside, what's the best way to tackle this?