Primarily focuses on Haven + Pillage. Balefire is rarely used, in favor of conventional weapons, and Aegis Storm is replaced completely (because it sucks lol)

Mod choices:

※ Growing Power: It's just universally good. Maybe it might be better to run faction-targeted Auras, but I simply cannot be bothered to swap mods before every mission.
※ [Power Drift]: It's either this or [Primed Sure Footed]. Nothing else really works too well here.
※ [Adaptation]: She's a tank frame, there's literally no reason to not run this.
※ [Redirection]:
※ [Blazing Pillage]: Where most of the damage comes from. Just spam the shit out of Pillage and things die pretty quick.
※ [Archon Vitality]: Health is irrelevant. The important part is that it doubles all heat procs, which dramatically increases the DPS of Pillage.
※ [Stretch]: While Pillage's Range is more affected by Duration, that doesn't really matter, since it's not doing much on its own. You want some Range in order to get more enemies affected by Haven, for [Blazing Pillage].
※ [Blind Rage]: Strength. I have it at Rank 9 because I just prefer it that way. Feel free to max it out.
※ [Transient Fortitude]: Strength, and the downside isn't really super relevant. Most of the time you should be cancelling Pillage as quickly as possible, so you can cast it again.
※ [Umbral Intensify]: Strength.

My [Hildryn] additionally has:
※ 3x Tauforged Crimson Shards (+15% Strength)
※ 2x Amber Shards (both +25% Casting Speed)

[Hildryn] has a LOT of good abilities with Helminth. Here's some recommendations:

※ Breach Surge: Works great with Blazing Pillage. Easily wipes out crowds of enemies.
※ Roar/Eclipse: You've got a ton of strength, so might as well use it.
※ Voracious Metastasis: This is mainly for ESO. It gives your allies energy equal to what you use to cast it, and [Hildryn]'s Helminth multiplier is applied to this, meaning that over the course of ~7 seconds, your allies get 750 energy.
※ Hideous Resistance: Very simple ability. One cast gives you 10 "charges", affected by Ability Strength, which grant status immunity. With this build, you'd start off with 32 charges. This is enough that this winds up usually being better than Spellbind, just because you have to cast it less frequently.
※ Condemn: The exact opposite of what most people do. This is pretty much only worth using if you're a crazy person like me, and want to bring [Hildryn] to Infested missions, since it gives you a method to gain shields from enemies that lack defenses.