Weapons from the Past is indeed the lowest rewards in the game, for some reason, probably shadow-nerfed after seeing it be the most popular mission pre-Hades due to the high gold reward. Beyond that, almost every other mission will give the same amounts.
My video is definitely not typical, but a good team just like that, no antagonist, can wipe Kuzmann out in 6-ish minutes, on average. Antagonists usually make it faster. The reason this mission is so fast is it's purely dependent on the team's skill in destroying objectives, every other mission in the entire game delays Raiders through the use of timed objectives that you have to wait through. Aneska would be the second fastest mission, but the first half still takes time. a full team jumping off the edges is pretty damn fast at collecting rewards too, though, if you're into that.