Rappelz is a free-to-play MMORPG from nFlavor and GalaNet set in a medieval fantasy world. The game features a deep job system that allows for unique character builds, pets, PvE and PvP combat. See full list on rappelz.fandom.com. It has skills to make a pet strong in addition to pet healing and pet buffs. Recommended weapon is a 2-handed mace. Strider: The Asura warrior. A class that fights melee or range.

The Damage Calculation
Damage Modifier * ( Pierce * ( 1 + %Pierce ) + ( Attack / 6 ) - (( Defence + Block Defence - ( Ignore * ( 1 + %Ignore ) - Defence Debuffs ) / 2 )) * (( 100 + Critical Power ) * Critical Rate ) + ( 100 * 1 - Critical Rate )) + Fixed Damage / 6
Simplified (No Ignore, No Pierce and with 100% Critical Rate):
Damage Modifier * ((Attack- Defence) / 2) * Critical Modifier + Fixed Damage

Damage Modifier are modifiers affecting the damage such as skill damage modifiers.
Attack is primarily all the additives multiplied by Base Attack
Base Attack is basically (Weapon Damage + Soul Stone + Base Stats).

Critical Modifier are the modifiers affecting the Critical Power and Base Critical (100).

Rappelz Wiki

Recommendation for building Damage

Huge damage is usually obtained by combining at least 3 of the 4 below:
1. High Damage Modifier

Rappelz Guide

2. High Critical Modifier

Rappelz Skills For Kids

3. High Base Attack

Rappelz Skills Test

4. High Frequency of Attack (whether 0s skill cast time or high attack speed)