Answer: you can run AK and WP only so many times before it turns to major boring shit.
300 myth = 10 WP runs. Do it in 45 minute blocks (grand total of 7.5 hours of major boring shit) or 15 minute blocks (grand total of 2.5 hours of major boring shit).
Now granted, sometimes you can tag along with a friend for more 'fun' because of the friend, not the content though.

I personally do speed runs to beat my old best times. It's no great feat to kill tonberry king, but clear it in under 15 minutes makes it 'fun' to me where it otherwise wasn't.