Ich find das ziemlich einfach:

Ryokosha Level 1
Race: God
Job: God Apprentice
HP 200/200
ATK 50
DEF 10
INT 250
SPD 100

Schon fertig ein Char. =)

Monsters appears:
Slime
HP 30/30
ATK 20
DEF 20
INT 0
SPD 10

Slime attacks! Ryokosha is damaged by 10 HP.
Ryokosha counters, Slime is damage by 30 HP.
Slime is defeated.
Ryokosha earns 30 Exp.
Ryokosha reaches level 2.
HP+20
ATK+10
DEF+5
INT+10
SPD+5

New stats:
Ryokosha Level 2
Race: God
Job: God Apprentice
HP 210/220
ATK 60
DEF 15
INT 260
SPD 105

Ganz easy, innerhalb von 2 Minuten geschrieben.