Although i've spent my time primarily on Weaver and Leather-worker, i can offer my own insights on this.
Take the LvL55 Carpenter's Gloves for example:
NQ Hippogryph Leather = 600gil
NQ Raptor Sinew = 200gil (?)
NQ Rose Gold Nugget = 2000gil
Total Price = about 3000gil
For anyone who only has Leather-worker leveled, you can HQ those gloves maybe 5-10% of the time if you're lucky, else you'll need to buy the HQ ingredients for something like 25Kgil just to HQ them 2/3rds of the time. Therefore, you really need to be cutting that down a bit by farming, or selling your HQ results for 50K+.
HOWEVER, by using cross class abilities, it is possible to HQ from NQ almost 100% of the time, thus selling those gloves for 20K is still a profit of 17K.
Here's my every time combo.I promise you it's gold.
Comfort Zone - Alc 50
Inner Quiet - Leather 11
Ingenuity II - Blacksmith 50
Careful Synthesis II - Weaver 50
(If your Crafting is too low, you'll need to use this twice. Make sure that however much progress you make at this stage using it, that number is enough to finish it in one more move and then move on to the next stage)
(During these 4 steps take any available opportunity to cast)
Tricks of the Trade - Alc 15
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Steady Hand II - Cul 37
Waste Not - Leather 15
Basic Touch 4 times
(DO NOT use Tricks of the trade during these steps)
(But feel free to use it immediately afterwards)
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Steady Hand II - Cul 37
Ingenuity II - Blacksmith 50
Touch Moves X2
(Now, depending on your leftover CP, you have two free steps of time to use Touch abilities. Do some basic math as you need 56 CP left over to finish. If you haven't enough and are lucky to get a Tricks of the Trade pop up, then use that + one touch move, but otherwise do not use Tricks throughout this entire last phase)
Great Strides - Leather 21
Byregots Blessing - Carpenter 50 (Sometimes you get between 1,500 and 2,000 quality gain on this move. Beautiful.)
Careful Synthesis II - Weaver 50