I got this idea from another thread, but what if the dual was tweeked a little. Reyes, being the dishonorable ratfink that he is, has more than one guy backing him up. If you save Sloane from the sniper she shoots the gun from Rayes' hand as usual and you immediately have a shot at Reyes. If you take it he is wounded and his troops cover his evacuation (Sloane stays in power). HOWEVER, if you don't take the shot Reyes gets under cover and his troops overwhelm you, forcing an emergency pickup by the Tempest, Reyes takes power, and Sloane, with nowhere to go, becomes a new squadmate with mad combat skills. As a bonus, add a repeatable Sloane section to the Nexus leadership's dialog wheels so we can watch them scream over and over.