This is a great [Vauban]. Need to unveil a riven doing a solo level 30+ defense mission without letting enemies even scratch the shields? This guy. Want to use him on Steel Path and not get wiped out, or chill while defending objectives on lich-hunting missions? Throw Ivara's Quiver onto him and play with your high-range high-duration tech toys while invisible.

Another great option for Helminth is to replace his 3 with [Octavia]'s Resonator. I use Resonator and Quiver interchangeably, but mainly Quiver these days.

If you really want him truly maxed out, you could also forma the Exilus to V to fit a fully ranked [Cunning Drift], but it's only worth an extra 5% range.