There are many ways to level crafting in heavensward.
1. Grand Company Supply and Provision MissionsThe easiest way to gain exp is to complete grand company supply and provision mission trade in everyday.
These gives great exp and most of the 50-54 items can be purchase directly through vendor for 10-30k gil.
These are quick and easy way just to buy and trade it in if you're busy leveling DoW/M.
2. Leves This is a great method to level too the following list provide list of item for leve 54.
I selected these leve because it is somewhat easy to prepare.
I recommended to get Minimum with the GC seals you get in method 1 because you'll need that for GSM.
* means they're repeatable quest.
CRP
Quest Recipe Dark Chestnut Lumber lvl 54 leve*
BSM
Quest Recipe Hardsilver Saw lvl 54 leveARM
Quest Recipe Titanium Nugget lvl 54 leveLTW
Quest Recipe Dhalmelskin Breeches Of Maiming lvl 54 leve*WVR
Quest Recipe Ramie Halfgloves Of Healing lvl 54 leve*GSM
Quest Recipe Hardsilver Magnifiers Of Casting lvl 54 leve* (Minimum)ALC
Quest Recipe Enchanted Hardsilver Ink lvl 54 leve*CUL
Quest Recipe Dhalmel Fricassee lvl 54 leve*Another way to level CUL is through Ishgardian Muffin lvl 52 leve* it requires less crystal and the time to farm since you can buy other ingredients in Old Gridania and need only 7 crystal. The down side is that this is not a repeatable quest and only yield max of 281,492 exp / leve instead of 579,570 exp / leve.
3. Collectible Trade inThere is no daily or leve limit in this method.
You can collect the material you need a wait for the day that your item comes up in the list.
Starting level 56 and gives you blue/red scrips.
4. Normal craftingThis method is just by getting exp from simple crafting it'll require a lot of materials.
There might be better ways to level please share thoughts.