FLEXIBLE OPTIONS:
If you are using a crit based weapon, can swap [Vigorous Swap] or [Rolling Guard] for [Smoke Shadow].
If you are using melee, swap [Vigorous Swap], [Blind Rage] and [Primed Flow] to three gladiator mods (rank 0) and aura to [Swift Momentum].
Aura is flexible for [Growing Power], [Brief Respite] or anything you prefer.
HELMINTH OPTIONS
Use [Xata]'s Whisper for special interactions eg double dipping headshot multiplier (for 9x multiplier), double dipping devouring attrition (for 441x multiplier) AND double dipping melee stealth multiplier (for 64x multiplier)
Use Roar if your weapons rely on status effects and use condition overload effect (e.g. Galvanized Aptitude/Savvy/Shot or [Condition Overload]). As of Update 30.9, the damage buffs from these mods do not interact with eclipse correctly and roar in fact gives a greater overall boost at maximum stacks.
Use Eclipse if you are not using CO mods. Eclipse which normally levels with light levels, can be 'snapshotted' by invisibility by casting Eclipse in bright light while invisible/or just before turning invisible.
Use Expedite Suffering for slash based weapons, and add [Stretch] over [Vigorous Swap] to make range 79%. Expedite Suffering compresses the duration of all slash procs, then multiplies them and applies it in one single instance of true damage.
Use Nourish for bonus viral damage and FREE energy whenever you refund marks on 4. Since nourish boosts all energy gained, this allows you to generate energy upon refunding energy when you lose marks.