I am sure this has been said at some point I can't imagine that it hasn't.

There is absolutely 0 reason to fusion craft any rarity of item for any reason. You can sell the 5 items it takes not even including the stones and make around 150% fo 250% times the value of the rarity your fusing for. Why make it so expensive if its not going to be a viable option. I paid 20 dollars for this brand new worker the day it came out and it holds 0 value.

The main reason it contains 0 value is the fact that you can not fast crast anything. In the time it takes to fuse one item I could of gone through 6 or 7 t9 rotations of fast crafting at a minimum.

EVEN IF I was given the mats (50 green t9 items) FOR FREE, to fulfill my 10 crafting slots. I could make more money by just fast crafting t9, an option every player has the ability to do.

Suggestions to fix: I am not sure thats where you come in. Maybe a dev sees it. Maybe, Make it 1 stone for rare and below and 2 for epic and leg Probably have to lower the item cost to 3 for rare and lower and 4 for epic and leg.

Side note: the values for making other special items are useless as well because it takes to much base mats as well as time.

As well as value calculations, I can make 10 t9 items at market value being liberal of 750k, not including multi crafts and full tree ascended for rarity boosts.