Originally Posted by
Deunan
It sounds like you were the only one in the instance. The Volge inside Arkbreaks do tend to gang up on one player if given the time even if there is a group (I've been hit by 3-4 grenades at once), but if there is a group, that generally doesn't happen again after the first death.
Assuming you were alone inside, the instance is meant for a group of players and not for soloing. It can be done though some players find it too tough, especially if over half a dozen bombers spawn. There is actually cover all over the ground level in the form of raised column like platforms that you use to jump from the ground floor to the mezzanine level and there are two small interior walls opposite of each other on the mezzanine level.
I solo them with a grenadier build.
Weapons: Big Boomer, BMG
Ego Power: Overcharge
Perks: Deadly Cascade, Killing Machine, Quick Charge, Blast Shield, Thick Skinned, Regeneration, Cellular Armor, Fortitude, Time Out, Pumped Up
Stay on the mezzanine level and spend the initial time sprinting around to avoid their shots and bombs. This takes a little patience but it will shorten the overall length of the encounter significantly because eventually the Volge will start to bunch up into a few groups which is what you want since your damage is area of effect damage and the benefits of Deadly Cascade will kick in. Once they're bunched up, pick one of the two interior walls to hide behind.
Activate Overcharge and bob back and forth from behind the wall to fire off one or two grenades at a time into a group until your magazine has emptied out and detonate. Doing just two or three reloads will kill off all the Volge in each group. You will take AoE damage from some of the grenades landing nearby, but Blast Shield will minimize the effective blast radius of some of them on you to prevent your death and your other defensive perks will minimize a lot of the rest of the damage. If your health gets too low after a few of their grenade volleys, switch out to the BMG and run around the mezzanine to get back to full shields and health and start all over again. Rinse and repeat as needed. Run to the ammo box as needed or use Ammo Spikes.