«Auto-attack Damage Bonus»
Class			Bonus 1			Bonus 2
Pug			Strength		Intelligence
Gla			Strength		Mind
Mrd			Strength		Vitality
Arc			Dexterity		Piety
Lnc			Strength		Piety
Cnj			Mind			Piety
Thm			Mind			Piety

«Parameters and Their Effects»
Strength:
Attack Power (This affects all attk/def equations both: auto-attack and weapon-skill; so for melee dd classes it's just about the most useful stat)
Damage dealt by pugilist, gladiator, marauder, and lancer arms

Vitality:
Damage taken
Enhancement Magic Potency
Maximum HP (??? HP : 1 Vitality)
Damage dealt by marauder arms

Dexterity:
Accuracy
Block Rate
Parry
Damage dealt by archer arms

Intelligence:
Attack Magic Potency
Damage dealt by pugilist arms

Mind:
Healing Magic Potency
Magic Accuracy
Damage dealt by gladiator, thaumaturge, and conjurer arms

Piety:
Magic Evasion
Enfeebling Magic Potency
Maximum MP (??? MP : 1 Piety)
Damage dealt by archer, lancer, thaumaturge, and conjurer arms

The suggestion from these is that for
Melee DD Classes: Raise Strength > [Primary/Secondary dmg stat] [> [Secondary dmg stat]] > Dexterity
For Magic based DD: Intelligence > Mind > Piety
For Healing: Mind > Piety > Intelligence
For Tanking: Vitality > Dexterity > [Auto-Attack dmg stats]


For DoH and DoL they mean something a little different.
Attribute effects for Disciples of the Land:

Botanist:
STRENGTH: During the logging approach phase, it will be easier to determine the proper angle for each item.
INTELLIGENCE: Number of items acquired by botanists will be increased.

Miner:
VITALITY: During the mining approach phase, it will be easier to determine the proper force needed for each item.
MIND: Number of items acquired by miners will be increased.

Fisher:
DEXTERITY: During the fishing approach phase, it will be easier to determine the proper rod movement for each item.
PIETY: Number of items acquired by fishers will be increased.

Gathering: Lessens depletion of the Remainder gauge when using a main hand tool, and increases the chance of gathering. items when using an off hand tool.

Output: Increases the number of gathers or hooked fish.

Perception: Makes it easier to obtain high quality items.

Attributes for Disciples of the Hand will increase the resulting product’s quality.
Carpenter
Main Hand: VIT / Off Hand: DEX

Blacksmith
Main Hand: STR / Off Hand: MND

Armorer
Main Hand: VIT / Off Hand: STR

Goldsmith
Main Hand: DEX / Off Hand: INT

Leather worker
Main Hand: VIT / Off Hand: INT

Weaver
Main Hand: DEX / Off Hand: MND

Alchemist
Main Hand: INT / Off Hand: PIE

Culinarian
Main Hand: MND / Off Hand: PIE