One idea that occured to me, and one which you might be able to make work since you can "darken" shots, is to use the way these fights are all shot in close-up to give the illusion that Obi Wan and Anakin are fighting Dukoo together.
We'd never get a good master of it after they circle him together -- but you would build to a beat where Dukoo force-shoves Anakin into the wall, then to a beat where he cuts Obi-Wan -- goes in for the kill -- and gets stopped by Anakin. Then the remaining Anakin shots allow you to finish the duel in short-order.
You'd probably have to darken the whole duel so the first shots match the final shots because most of the Anakin/Dukoo duel is in half-light.
But having them both fight Dukoo together is the most natural thing for these Jedi to do character-wise -- at least in this edit. Trying to justify a rushing-in Anakin is another way to go, but somehow a second choice to me. I think I'm afraid of how dumb it makes him look. That could be improved if Obi Wan does not ask him to not rush in-- if somehow it were Obi-Wan's idea for Anakin to rush in... I don't know.
Both fighting at once is best, isn't it? If the footage were little better, it would be a no-brainer. But with creative use of what's there, I think the impression could be achieved -- as long as the underlying idea is that Dukoo is WAY TOO GOOD for them and WAY TO RELENTLESS (no chatting, no pausing). I think there has to be a unique flavor to each duel -- and this one feels the most generic of any in the PT. "Relentlessness" is my suggestion for making it unique.