I'm a pow type character.I already full my pow and i am using sword as my main weapon.So what is the second stat that prefer to focus now?

Should i focus on Vit because i need to raise my defense but most people told me that defense not that important and can increased by using magatama.Or i'm gonna focus on Dex? I prefer the stat that can increase my damage. Can tell me the reason?

Dex for damage

12 Dex gives 1 crit
24 Dex gives 1 cool down reduction
24 Dex gives 1 attack speed

Literally the most overpowered stat in the game.