Some tips: Faction Keys can be farmed in the Sewers. Faction Loot boxes often have skins and mods in addition to gear, so they are worth the extra effort. The Sewer where the Bridge goes down into the Roosevelt Island has 5-6 key boxes. Going right after donating to the nearby Control Point (provided you have put points into the perk) will make these much easier to find. Weapon Mods only need to be crafted once and level with you, so there is no reason not to craft all of them as soon as you unlock them. When your Field Efficiency caches start giving you Purple gear, you should notice shortly thereafter that your Crafting Bench can be upgraded. This does not happen automatically. Go to the bench and find the option at the bottom of the menu (if available) Dovetailing off Marco's video about Blueprints and Control Points, keep in mind that all the boxes at each Control Point you have liberated refresh each 24 hrs, except the large orange crate. This means once a day you can do a 'Control Point Hop' and have a dozen or more weapons and gear pieces of your current level, if you want. Now, this could take a lot of fun out of the game, and may get patched out at some point, so use at your own discretion. Either way, if you need some quick money, crafting materials, or to gear up after ranking up, this is possibly the fastest, easiest way to do it. Personally I only do this if I need something quick for a Blueprint or purchase, because I enjoy the gameplay. That said, it is a free, legit resource.