Good profit synth if you farm your own Coeurl Hides, but doing this is very boring as the hides in Meriphataud Mountains are very low drop rate, Lv71 synth, Coeurl Leather: Dark Crystal, Windurstian Tea Leaves x1, Distilled Water x1 Coeurl Hide x1.
Additional Note: Sells pretty slow on AH, so be prepared to wait...
A lot of crafters start synthing these way below their cap because it's the easiest thing to skill on. Because of this it breaks a lot, so, if you have the space (and with the added Mog Satchels and forever upgrading lockers you should hopefully) I'd recommend keeping all your hides and waiting to synth them when you get back to town with some advanced synthesis support because it's a lot less breakages and a lot more profit :)
On a side note, if you farm them on THF or /THF then every time steal is available go and steal from particular Goblins to get some mythril coins on the side.
Hmm, stacks sell for 20k, yet singles sell for 3-4k each! Only an idiot would sell them by a stack apparently! Do I need to reset these prices to make them make more sense?