Gergus

Overview
Gergus "Leader of the Freebots" is the boss at the end of the planet Berenia. She is one of the few enemies that have no weakness in particular and is also not strong against any particular element. Gergus' weapon is Gergus' Repeater, her offhand is Gergus' Translocator, and she carries a special poison grenade.

Gergus' Repeater, Gergus' Translocator and Gergus' Poison Grenade can be obtained after the fight. At the end of the fight, you will also obtain a Chaos Key.

Strategies
Always be careful of your energy when fighting Gergus. Whenever you have a higher attack gauge than her that's greater than 6, she will always use the translocator. This can sap a lot of your energy and really cripple you, especially if you are a priest. The best way to avoid this is to simply use your energy and bring it somewhat equal to Gergus'. Use it for direct damage, or for discard till you hit modifiers. If you can ensure that Gergus does not get too much energy off you, she will not be much of a problem for the next couple of rounds.

There is nothing better than Gergus getting a higher attack gauge value than you while drawing, since she will spend her EP using her Repeater and Overload Repeater. Tying or winning on this round will cripple her energy situation, which makes her much easier to handle. Really, the whole battle is just playing around the Translocator.

Whatever you do, never lose a round where she plays her Repeater and Overload Repeater. You will take massive damage and she will gain a large amount of EP due to the multiple strikes.

At low EP she will play the poison grenade more often. This is not much of an issue and taking a hit of this is also not a big deal, since Poison is a slow acting affliction, and you will lose it at the end of the planet anyway.

Dialogue
Gergus: "What's the meaning of this? Are you another low-life bounty hunter here to throw away your life?"

Player: "That Chaos Key you're wearing is very dangerous. It is corrupting you and everyone around you. Also, I need it to save the galaxy."

Gergus: "This conversation is boring me. Maybe you'd like to talk to my trusty repeater for a while?"