I dunno how MrSatan did it in terms of gear, but I did it with Pure EVA set with maxed Enfeeble. He also skipped the side rooms in that corridor leading up to the third boss. It wasn't a 20 minute run, but it was a successful one.
This game can be a princess when it comes to applications that interfere with it. Be sure you've done everything listed in the link provided.
Also remember to have SB on the exceptions lists of your anti-virus and Firewall. Also deactivate everything non-essential that is running in the background.
I can come up with a couple players that would be like this and I was among their victims too a while back.
Now a lot of people hunt the living shit out of one of them.
The only difference between Base Stardust vs non-base stardust is one is tradable, while the other is not. Enhancement rates are irrelevant to this matter. They can be sold via npc, but it cannot be put up on the auction house.
You need to complete the quests that lead to the ones you're asking about. All of the quests have pre-requisites in order to trigger be it level or even older completed quests.