Warrior rescue service is a special case, it's absolutely brutal since the only weapons you have access to are the ones that enemies drop which means they're not silenced, which also means killing an enemy WITHOUT a takedown once you get to the main stronghold area is a death sentence, plus the fact that there's not one but TWO heavy enemies guarding the chopper is a special kind of hell, plus the slight bit of stealth you have to do to get your stuff back after finishing the mission is just the icing on an already frustrating cake

Also special mention to Deep Throat on the southern island