> 98% of Operation Paper Trail basically easy.
> That fucking helicopter, wrecking me every time.
> Can murder all the jugs without a scratch, and reach exit.
> Dead by helicopter.
> Dead by helicopter.
> Dead by helicopter.
> Rail gun legitimately phases through target no matter how well aimed.
> Keep missing will missiles, and aim not improving when I can only attempt it once every half hour.
> Sniper with explosive rounds is too weak and slow to finish helicopter off in time.
> Shotgun with explosive rounds just doesn't reach at all.
> Can't install explosive rounds in anything faster/longer.
> Minigun not finishing quick enough, maybe too far away.
> Dead by helicopter.
> Dead by helicopter.

What finally works, is to hide. The simple answers are the best answers. Cower like a coward and find cover. Seems like just delaying the inevitable, but no. There is exactly one good place to take cover, and you can shoot missiles around the corner from back there. Finally a stat that works. Finally finished the mission without a single scratch on me. Tier 4 over, and I can gradually forget everything I learned along the way.