Potent Superior Sharpening Stone

From what I can tell this is exactly the same as the regular Superior Sharpening Stone except the duration is 1h instead of 30m. The cost to create it is same as creating a Superior Sharpening Stone, except you use 1 regular Superior to create 5 Potent Superior.

Why then is the TP cost barely higher than the regular Superior? Shouldn't it be about 2x the price? Especially given that ascended food lasts 1h, I'd have expected that these are a lot more popular.

I must be missing something?

My guess is it's the output tanking the price.

For the materials of 2 Superior's, you create 5 Potents.

Means that the market is easily flooded with Potents.

Even with the current pricing of 9s for Superior and 12s for Potents it's still a net gain of 42s per Potent craft.