Funnily enough, the most optimal way of being able to afford a goldpack is currently to level an Elyos on Nergal.
Don't level your inventory size, reach around level 75, use the money you got from quests and buy a gpack from the market (9mil gpacks, questing to 80 gives you around 12mil total).
Delete the character, repeat. Each goldpack will take roughly 8hrs to farm. This grants goldpack status on any other server and will save you a ton of time/Kinah on your main server.
Watch this get nerfed within a week or Nergal-Elyos goldpacks skyrocket to 20mil.