I had a thought about this recently so I'll drop it into this thread.
4 and 5 first, then once the shocking twist pertaining to Luke that the whole world already knows is exposed, watch 1,2 and 3 as a "flashback" almost as to how Darth ended up there, then finish the whole story off with 6
4 and 5 first, then once the shocking twist pertaining to Luke that the whole world already knows is exposed, watch 1,2 and 3 as a "flashback" almost as to how Darth ended up there, then finish the whole story off with 6