Questions about the order of Endgame events

[Durendal 5]

With TSLRCM restoring everything that It does, I got it into my head to try a "Worst Ending" run, but depending on the order of events what I want to do may not exactly be feasible.

Actual question below hidden in the spoiler.

The short of is, does Atton confronting Mical happen before or after they confront Kreia and Atton fights Sion?
Also, is it possible to have both of those events trigger in the same playthough? From what I understand, Atton turning
on Mical is effected by both of their influence, and Atton fighting Sion is triggered by him being Lightside?

 

[Hassat Hunter 571]

Spoilers, obviously

 

 

Instead of. If Atton fights Disciple he wont be at the confrontation, nor fight Sion.

 

[Durendal 5]

 

Ah, that's a shame, since that means what I had wanted to do isn'treally feasible.
Though I understand how the events could be incompatible from a story or scripting perspective.

Thank you for answering.