Swapping around a polarity when using Forma will Save you 2.
Should require 3 in total if done right- and that includes the Umbral Polarity!

~~ Shards & Misc. ~~

(3 Red) +45% Strength
(2 Yellow) +75% Casting Speed

Bellicose gives +26% Strength from 1,069 Health
-otherwise, +31% Strength from 1302 by Triple-Umbral

~~ Disclaimer ~~

Fleeting Expertise and Transient Fortitude are at a reduced rank on purpose!

~~ Info ~~

This build has pretty much everything Equinox needs- Duration is just fine being 25%. If you'd prefer a helminth ability, I recommend you overwrite her 2nd ability! The way she functions properly requires her other abilities.

Peaceful Provocation is the Flex Slot. It can be replaced with anything you like! Adaptation, Primed Continuity, Umbral Fiber, Augur Reach for maximum Range... It's up to you!

Growing Power lets you reach 301% Strength, which is a 75 Shields/kill Mend, but even without it, You still enjoy a comfortably strong build along with whatever Aura you prefer.

She's a Support-frame, so she's there to make the mission easier for everyone by Restoring the Squad and Clearing the weaker foes- (or holding the [Maim] charge for a quick Acolyte kill!) I only hope to do her justice by bringing her abilities' full effectiveness into the light.