One thing I like to get is lots of speed, and that one ability that gives you immunity untill you get hit once. Also get as much health as possible, homing things like the green rarity daggers are also good, also get low cooldown and stack volley upgrades because and then you can keep on chaining the shotgun and the axe, also you can get life steel things since your gonna go on a long killing spree, at the beginning of late game waves start to reveal most of their weak points before killing the so you can chain better. And also focus on killing the drones or the light bulbs first because they are the most dangerous ones.
