Question about Dual Blade Job Adv.

But if you leech yourself (make sure you're dual blade lvl20 at least), it doesn't matter if you skip all your job advancements, since you can do them all at lvl 120? Dual Blade doesn't have a MaxHP/MaxMP skill...

Unless Nexon made the 3rd/4th/5th/6th job quests with a level limit... that would be hilarious though!