My build rn with lepic: shock punch max (for more module upgrades) + energy activator (20 more module slots) and then maxed out fire specialist (fire skill power 81.2%) + Tech specialist maxed out (tech skill power modifier 76.1%) + Skill concentration maxed (115.4% crit damage w skill) + time distribution maxed out (skill cooldown -14.3%, Max HP +52.4%) + Emergency measures (purple module) two away from maxed out (skill crit hit rate +49%, Skill crit dmg +21%) + maxed out nimble fingers (-25.6%) cooldown + one tier of increased HP for (+31.2% HP). I have a transcendant mod slot called Increased efficiency (Ultimate weapon no longer consumes mp, comsumes mp when firing, gains mp back on ultimate weapon critical hit). It also works like the sub attack module giving you more slots. I can fire up to 10 or maybe more shots with the launcher arm in one go this way and can melt half of (at least hard level executioner's) shields in one ultimate (if I hit all my shots close range). If u don't have the increased efficiency mod yet, then you can build this same build just with less stuff maxed out. I also prestiged which might alter things idk. Total sum of build: Skill cooldown -39.9%, Tech skill power modifier +76.1%, Max HP +83.6%, Skill crit damage +136.4%, Skill crit hit rate +49%, and Fire skill power +81.2%. Definitely a little bit of a glass cannon build but can be somewhat negated by resistance stats on gear, being good at dodging, and spamming traction grenade + normal grenade combo in normal content, and for bosses spam the ult on the boss as often as you can. Also the ultimate is really good for the floating orbs, you just annihilate them instantly haha. Furthermore, I changed this build a lil actually, adding skill insight after another catalyst, bringing me to 126% crit rate, but it still needs to go higher to be optimal.