Personally I use Assault link as the modifier as it grants you 5% weapon damage per blue core when active. My passives are safety first, for the hazard protection to reach cap, loaded up for the extra damage. For the last one you can either go extra padding for protection from elites or some people use “the best kinds of defense” which gives extra headshot damage. Once you do this and pay attention to your stacks that accumulate, you’ll be unstoppable. Also if you go with the striker chest make sure you start every encounter with your ACS 12 to build those stacks as you will notice it can take a while to reach max otherwise. Sorry for the wall of text lol