Hmm..

It's easy since it's auto-play for now. If you set it to auto-quest mode and auto-heal at 80%, you won't die easily as it quests and heals on its own. While AFKing, just turn the screen back on when it turns off occasionally, Empty your inventory once (disassemble items, open boxes, etc.), Buy the maximum amount of health potions and then set it to auto-play again. I felt like I leveled up quickly until around 35, but the number of monsters to defeat in quests is increasing and leveling feels a bit slower. I'm currently playing until hidden quest 50, and if there are more hidden quests, I'll continue, but if that's it, I probably won't. I'm spending about 2 hours a day because there are more hidden quests than regular ones. But it seems like skills don't activate automatically... Since it only attacks with normal hits, monsters don't die quickly.