How do you get to level 80 in 4story fast

(1) Keep doing quest chains and repeatable qs
(2) Do dungeon quests when you hit 19,29,39,49 etc
(3) Go to Mission areas if you got AoE class (wizz, archer, priest, warrior) and just keep killing massively
(4) Buy some Cash Points to get Choco for 3H or 9H - will give you XP even if you dont do anything.