There is some good information for you in this thread:
We use fulfillment workbench to release orders to ship, then pick through EMWW handheld scanners. Once picked, the shipping team creates the pack from Actions - View picked orders. The entire pack is created from this process.
We also use the Pack Out function. We use PCID functionality where each pallet has a pcid barcode label. We can scan each PCID into the pack out screen and the parts are added to the pack. Pack out would work with a part number barcode as well, you would need to know which bin it came from.
PCID is awesome and horrifying at the same time. Read up on the functionality, it may be useful. I love it for FG going out the door.