My suggestion for what it is worth.
Go in with a sniper rifle, the Katrov 545, a mask and a spare, molotov, stims, ammo box
Come in with the little helicopter and land it just outside the zone (so you don't get DDOS
Snipe and clear what you can see, have a silencer on the sniper riffle
Get the chemist and make your way to the helo
Extract at the furtest extraction
I would recommend solo so that the helo takes of quickly or have a team that is willing to suicide once you are on your way to extraction. That way the Helo takes off about 4 seconds after you board
The only person who gets the blue print is the one carrying it. So trustworthy team mates are essential. Otherwise you are better off alone