1.Accuracy is the bloom on the reticle on screen so yes the effect still works while not being zoomed in 2.Yes, the higher the scavenging the more likely yellows will drop 3.DPS absolutely does not matter, go for a crit/stability/accuracy build with good abilities and you will be good 4. On the map in the darkzone, if the landmark is purple that means there are npc's there, if it is white there aren't. They will regularly respawn every 10 minutes or so (at least that's what it feels like) also don't forget about the subway bosses, so many people do 5. The common consensus is that the high end vector is the best weapon but that doesn't mean anything if it has a bad roll, even less if you can't use it well. Just go with what you enjoy and you will be a ok