How do I level up fast?

[Blue Plus Symbol]

(My English isn't good because I live in Japan, I'm sorry.)
How do I level up fast? I have played IOU for 148 days but I'm still level 116 and my IOU Score is only 8010.
I think I'm much slower than other players. For example, Ragekai was level 129 at day 39, but I think I was only level 70 at that day.  

[Hiian]

it depends how much you play/idle. and if you only solo its alot slower then if you are playing in grps..

[Blue Plus Symbol]

OK. I'll be active. And I'll be playing in groups, thank you very much for your support.

[Antonio]

Leveling in group to 1-hit ko an monster with a strough member is a bit useless, there is a delay of respawn of monster.

[Wq9ill]

Just pay loads of $$$, it'll make your leveling speed lightning fast

[Ragekai]

if you only got to 116 in ~ 4 months-- im going to guess you probably didnt leave game running all day.
My game is on 24/7.