[Energy Transfer] is one of the most overpowered augments on [Equinox] depending if you are using ult in hybrid [Equinox]
It just lets you access 2 key survivality abilities from night form while still being able to nuke at full potential

Requires archon shards
My archon shards
+25% to +30% ability duration
+50% casting speed (can be cut off to +25%, but because i swap forms and ability 4 takes seconds to activate... I might really need it)
+50 to +75 max energy
(Optional in case of a free slot) +100% to +125% health from orbs or +50% to +75 energy from orbs

Helminth options
Roar (Duplicate your [Maim] damage)
Sentient wrath (it gives big invulnerability debuffs than rest & [Rage])
Thermal sunder (consumes half of your energy, but it's very good cc and... damage... Kind of)
Pillage (you dont need it for corpus but for grineer, mostly recommended)
Terrify (better armor strip but with cc)

Arcane intention grants +500 worth of health if both 3 and 4 are active and some healing, which can be helpful for a day form only [Equinox]... But not what i'm going today

Molt augmented is a flex slot