Originally Posted by
Belial
The stat system upon initial release of the game was broken and incomplete. Currently based on solid parse results, DEX provides no gain as far as critical hits & accuracy is concerned. Piety has an impact on the ability of DoTs (from spells or weapon skills) to stick. STR does have an influence, but it is very minimal. Vit/Mnd are important for keeping your HP/MP up, and MND on an Melee class actually increases your survivability tenfold provided you have your protects/shells/cure IIs/sanc IIs.
So yes, stats are broken and anything pumped into STR/DEX at this point in time is moot. Once the battle changes are implemented this Spring, I'm sure you will see stats being fixed along with them, or near-to. For now, pump your VIT & MND as they will be the factors in helping you survive.