This build is incredibly simple, sure, but it won’t let you down. Almost all of the skills in this build feed directly into shields and tanking abilities, and a special focus on taking down bosses.
Starting out in the Railgun skill tree you’ll want to grab Security Bear for the bubble shield and then plow all your points into Armored Infantry, which gives you damage reduction and more gun damage when your shields are active – easy, simple synergy. Get Thin Red Line and Vladof Infantry for even better shields and then grab Full Can Of Whoop-Ass, which will instantly regen your shields when you enter Iron Bear – very clutch. Grab the the single point skill tree, then get all three points for both Behind The Iron Curtain (for feaster shield recharges) and Desperate Measures (for a simple gun damage buff). This grants access to Phalanx Doctrine (level this up three times) and Force Feedback. Force Feedback is especially great for PC players who can hit headshots as it will start recharging shields whenever you land a crit. Phalanx Doctrine, meanwhile, provides some decent buff stacks for shield and gun damage.
After all of these you need to grab the only point in Tenacious Defense, which instantly rewards a portion of shield and buffs gun damage for a short period after your shields deplete. It is phenomenal for getting out of tricky situations.
In the Minigun tree you want to grab Dakka Bear for a cheap but powerful piece of equipment. Then put four into Cloud of Lead, which provides some elemental and damage buffs. In the next tier down you’ll want to drop some points into Scrappy, which will just generally make you more mobile. One more tier away, we suggest Rushin’ Offensive so you can shoot and sprint at the same time, then max out Scorching RPM’s for two very handy buffs to crit damage and fire rate. In the final skill tree, you simply want to invest in Deadlines for better Iron Bear economy, then pour any remaining points into Grizzled for more action skill usage.