So yeah, I finally got past this one. I should apologize to the community. I was wrong. The problem wasn't the quest, the problem was how I was trying to complete the quest. I had also read the posts that said that Mako was the problem. So I tried at least 10 times after sending her away. I finally got a response back from support that was extremely vague that lead me to believe they were trying to tell me that the quest was possible. So that's when I thought about it some more and realized that the quest wasn't sending Mako away, she was in the room with me. So maybe I was supposed to cheat and "use help" despite the fact that the guy says "no help from others" in the quest. That would be the sort of thing a bounty hunter would do.
So I tried it. And I noticed that when I had Mako with me, she attacked the others on the platform and died. But then I realized that the mobs who came after me were way more hurt than any other time, possibly because of friendly fire from attacking Mako. I died. But tried it again. The second time, they killed her but I was better ready for them when they showed up. I took them out one by one and got through. It is important to drop off the platform so that you can solo them when they come after you. But the quest is totally possible. Good luck to those that follow.