Well...
I think OT Vader is better than Maul so he might be able to kill Qui-Gon quite fast.
Leaving
OT Vader vs ROTS Obi-Wan
NJO Luke vs Count Dooku
OT Vader has a good chance to take Obi-Wan on his own. He has more pratice in lightsaber combat and more experience with the force than ROTS Anakin and his suit can partly withstand lightsaber attacks (seen in ESB). Still that would be a long fight.
NJO Luke will take Dooku and that will not take as much time as the fight Vader vs Obi-Wan so you have Obi-Wan facing both Skywalkers and he gets killed there.