fastest way to level up

i want use lann spear! but im lvl13 plz tell me the fastest way to level up!

Use any hack to give u invicibility Vindictus + is one of those options. Start grinding Decisive Battle on HARD and there you go. You should be lvl 20+ in less than 2 hrs.

Get out of here! How DARE you suggest hacks as an assistance for this man's request! What do you think we are, some kind of hacking forum!?