This guide it about the stats.
Strength-to increase damage rate
Agility-to increase speed and defense rate
Vitality-to increase HP points
Energy-to increase MP points and damage
Command-to increase pet's damage rate
DK:
1 point of vitality used=add 3 hp points
1 point of energy used=add 1 mp point
6 point of strength used=add 1 damage rate
(2nd) 6 point of strength used=add 2 damage rate
15 point of agility used=add 1 attack speed and defenses
20 energy point used=add 1 percent of skill damage
DW:
1 point of vitality=add 1 hp point
1 point of energy=add 1 mp point
12 points of strength=1 damage rate
10 point of agility=1 attack speed and defenses
6 points of energy=1 wizard damage rate
ELF:
1 point of vitality=add 1 hp point
1 point of energy=add 1 mp point
12 points of strength=add 3 damage rate
50 points of agility=add 1 attack speed
3 points of agility=add 1 damage rate
MG:
1 point of vitality=add 2 hp point
1 point of energy=add 2 h]mp point
12 points of strength:add 3 damage rate
15 points of agility=add 1 attack speed
DL:
1 point of vitality=add 2 hp point
1 point of energy=add 1 mp point
12 points of strength=add 3 damage rate
10 points of agility=add 1 attack speed
Level added points
BK:1 level up=add 3 hp points
SM:1 level up=add 1 hp points and 1 mp point
ELF:1 level up=add 1 hp point and 1 mp point
MG:1 level up=add 2 hp point and 1 mp point
DL:1 level up=add 2 hp point and 1 mp point
Special Thx to McLovin