Mmmmm, delicious 2.18 sprint speed.
Redline is kinda wack. Everything you'd expect to scale with strength scales with duration, and it's one of the few abilities that can be too good; by which I mean, it can be very easy to accrue so much fire rate that a weapon's recoil becomes monstrous, or burns through ammo at an unsustainable rate. ~200% duration is my attempt to find a happy medium.
This is maximum range without using a corrupted mod or the exilus mod slot. Mostly for Silence; but it is convenient to more easily refresh [Thermal Transfer]. With a different Helminth, these mod slots would likely be strength.
I'm somewhat concerned about only 30% efficiency on a build that will sometimes want to spam Thermal Sunder, but every other ability is only cast once per minute. I'm counting on Kinetic Plating to keep up; if it does not, [Thermal Transfer] should probably be dropped for [Nira's Hatred].
Against the Corpus, I trust Kinetic Plating to keep us standing, especially with Silence active. Rolling Guard is a good backup, but toxic eximi will just straight-up kill you.
The last mod slot goes to [Thermal Transfer], because I did not know what to do with it. I don't value Strength above 100% on any of these abilities (though ironically, it would be nice paired with [Thermal Transfer]). It's a flex slot. I didn't feel the build needed anything more upon reaching the arcanes, either (Energize to prop up the energy economy?), so they're generic, easily-procced damage buffs.
I like Silence because it solves a lot of the annoying things eximus units do, but Fire Walker would be more fun in less challenging missions.