you take the efficiancy and you say huh well i can cast all my abilitys within 1 full bar of energy and you accept the fact that you will just need to stand still for a couple of seconds to trigger [Hunter Adrenaline]
and you enjoy the never ending supply of energy if you have trouble getting that energy you get arcane energize.

[Steel Charge] is swappable to since you have capacity left for something like [Growing Power] for even more dmg i just like melee so i have [Steel Charge]

also if you dont want to put in 5 forma you also have the option to not use [Power Drift] at all also saves an exilus adapter and it becomes a 2 forma build since you can just ignore using forma on [Augur Secrets] and [Streamline]