The final encounter pits you against the two Shield Brothers. The fight has two distinct phases. In the first phase, you'll face Valus Mau'ual in a large circular arena. He's a heavily armored Cabal with a powerful slam attack. Focus fire on him while dodging his ground pounds. Periodically, he'll retreat, and Valus Tlu'urn will appear in a separate, smaller arena, bombarding you with rockets. You'll need to split your fireteam or quickly switch targets to deal with Tlu'urn's damage. In the second phase, both brothers will be present in the main arena. They share a health pool, but each has unique attacks. Mau'ual will charge and melee, while Tlu'urn will stay at range and fire rockets. Prioritize taking down one brother first to simplify the fight. Use your Supers and heavy ammo strategically. Communication is key to managing their attacks and avoiding being overwhelmed by their combined assault.
