All characters are in prime Darth Bane gets his parasitic armor and has the all his knowledge and experience of his prime version.
How does Luke get past the armor to strike Bane? Does he even need to ? ... If you can describe how he wins that would be cool too.
Round 1 - Force
Round 2 - Duel
Round 3 - All out
Round 4 - All out on Ambria where there is a Dark-side Nexus.