I do not want jump potions for either the story or job levels, but if they absolutely must be added, I think it would be best if they could only be used if you have already cleared the story once on some character on the account for the story potion, and you can only use that job's potion if you have already fully leveled up that job on some character on the account for the job potion. Yes, this prevents new players from getting into the game and just jump skipping to the end, and that's the point. Jump potions, for the NA region, should only be used for when you want to make an alt, even if on another server, to play with other people and you don't want to transfer your main. Forcing players to go through the story at least once and level whatever job they want to jump with to max at least once will be the most healthy for the game in our region, in my opinion.