Groundwork

[worldly dagger]

So... I know the top set of numbers is the groundwork ability. The second set of numbers show up every time I hit an enemy. Is this a part of groundwork ability? What's it for and what's it do can someone explain please

[cinder falcon]

Its the Nuclear Amplifier (AKA Nuke Amp) stacks

Basically its your modules

Also, get a Solar drone for that build

And use Rangefinder instead of Overdrive

[unkempt thicket]

you gain stacks as long as you don't shoot