Depending on the Slot and the Class there are different possible secondary stat combinations on the items.

Force Shielder
Main, 2nd, Head, Chest, Gloves, Belt, Boots, Back

Physical Attack

Physical Defense

Magical Defense

Critical Accuracy

Accuracy

max HP

HP Regen

max MP

MP Regen

Block

Parry

Evasion

Attack Speed

Force Blader, Warrior
Main, 2nd, Head, Chest, Gloves, Belt, Boots, Back

All Attack, Physical Attack

Physical Defense

Magical Defense

Critical Accuracy

Accuracy

max HP

HP Regen

max MP

MP Regen

Parry

Evasion

Attack Speed

Priest
Main, 2nd, Head, Chest, Gloves, Belt, Boots, Back

Magical Attack

Physical Defense

Magical Defense

Critical Accuracy

Accuracy

max HP

HP Regen

max MP

MP Regen

Healing Power

Evasion

Attack Speed

Force Archer, Wizard
Main, 2nd, Head, Chest, Gloves, Belt, Boots, Back

Magical Attack

Physical Defense

Magical Defense

Critical Accuracy

Accuracy

max HP

HP Regen

max MP

MP Regen

Evasion

Attack Speed

Jewelry (all Classes)
Necklace, Earring, Bracelet, Ring

Physical Attack

Magical Attack

Critical Accuracy

Accuracy

max HP

HP Regen

max MP

MP Regen

Healing Power

Block

Parry

Evasion

Attack Speed