Wow, that is pretty cool. Of course, with the Fierce Diety's Mask you can make short work of really any boss. But I suppose it's how they used it that makes it skillful.
When I was around eleven, I had perfected fighting Goht on my brother's finished file of Majora's Mask.
I could beat him in 30 seconds or less. (Without Fierce Deity Mask or the Great Fairy Sword.)
... now I sound concieted. |D
I think this should be moved to the Classic Zelda section ... but.
Goht was always my favorite boss to fight, I would replay that fight every chance I got. It was so fun. I would time myself, but it was always like a minute or around there. This was without the FDM, so I'm not surprised that the fastest time is with it.
Now, do it without the FDM and beat it in 17 seconds and I'll be shocked