I don't know where should I start, and I hate to beat the bush around either~
Without further ado...
Below here are knowledge about Perang Cemen II Ancient Combat Gameplay, it's not complete and might change, think it as early idea or something.

~About Equipment~
Equipment divided by Main Weapon, Sub-Hand, Armor, Additional, and Special.
Each equipment can have 2 xstal slot excluding Sub-Hand, and any character are free to equip any kind of Weapons and Armors.

~About Battle~
In a battle, player can command character once that character are Ready to preform an action, how fast the character to get ready are based on ASPD not AGI, AGI does affect ASPD but ASPD are generated based on equipments and other stats relates to certain types of weapons.
-Attack
Preform basic attack with weapon, when weapon mastery reach a certain level, a skill related to that weapon mastery will be preformed instantly when learning it.
-Skill/Magic/Etc.
Preform skill or initate charge, each skill has their own effect.
For elemental magic include physical(brawler) and Recovery, once element mastery reach a certain level, a magic related to that element mastery will be preformed instantly when learning it.
-Parry
Preform Guard/Dodge, Guard will reduce any damage taken to 1 by consume Guard Power, while Dodge will completly Evaded physical attack by consume user Dodge.
-Item
Ok, I know this is obvious but there we go, item work instantly, and the limit of all item is 99 unlike it Prequel where some overpower healing item are limited.

~About Enemy~
-Ailment
Some Ailment has different effect for both enemy and player such as Poison, Burn, Blind, Paralysis, etc.

-Boss Ailment Resistance
A boss will gain resistance to certain ailment mostly Interrupt such as Flinch, Tumble, and Stun, these resistance will completely block the said ailment, the resistance duration for each ailment may varies.

-Damage Prorate
There are 3 types of damage:
Basic Attack, Physical, and Magical.
When player dealt basic attack damage to enemy, the resistance agaisnt Basic Attack will increased while resistance of other two (Physical and Magical) are decreased, mobs have fixed of min/max damage taken from this effect by 50%~200% but prorate formula for each bosses may varies.

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Lastly, thanks for your time~