Ghost of Tsushima Legends: Tale of Iyo Chapter 3 - Speedrun For Fun -

It's not the fastest in the world, but the fastest I've ever gotten to play it!
Dueling quickly wipes the corruption meter so you don't have to bother with clearing out the mongols or shooting the targets.
*added in music since chat audio got messed up - also cut out the beginning cutscene (that's why the time doesn't add up)