Well after watching the videos again it seems the pilot does not exit the heli. I have also noticed in my attempts the last 2 helis taking a long time to get to us.
The only thing I can think of with the last two choppers is having the gunner snipe the one pilot, get into the Valkyrie and take out the remaining chopper on the way to the checkpoint to save some time on the waiting.
I wish I could get this one done already, it's the last elite challenge I need to complete!
You know what could be helpful? A map of the spawn locations of these buzzards. I cannot seem to find one anywhere though
I really dont know. In the 2 videos I watched neither had to wait for the last 2 buzzards. The 1st two buzzards the gunner takes down from the mountain top. In the gtaseries video the nex t buzzards are taken out as soon as the team enters the heli on the beach. In katyperry's video it seemed they landed next to the gunner then took out all the buzzards. Maybe it just has to do with the timing. In a couple runs my team failed to reach the heli in 3 minutes, As pilot waiting on the beach the 3rd and 4th buzard will attack you before your team arrives at the heli. So maybe in a perfect run everything just works out with the timing of the attacking buzzards. I have really not had enough attempts at this to know for sure what exactly is going on.