There is no reason to do professional crafting anymore.
As an example look at an archi FB suit.
You can buy an Archriduim Coat FB of Outrageous for 40-50m in AH.
A craftsman Archi Coat FB (PC) 800m.
The difference? The crafted suit has an extra 1% amp, 150HP, is not char bind and cost an extra 750m.
Considering that it costs about 50m (at current AH prices) for the mats to attempt one archi suit craft and the high failure rate and the lack of ppl willing to pay that extra 750m you are better off just running dungeons and forget about professional crafting.