While the information in this guide is presented in this game, most of it is hidden from you until you unlock the respective trainers, thus you may not know what stats to work toward for classes you may be interested in. This is a guide to provide the requirements for class changes upfront so that you can plan your characters accordingly. I also provide the growths each class gives in case want to min-max growths for particular stats as a transition to your preferred ending class.

Note that in a vanilla playthrough, you can only have one of each Master class so plan accordingly. I have not unlocked New Game+ yet but from a brief look around the discussion forums, it seems there is an option to enable multiple master classes in new game plus.

I'll also note what skill trees each class has access to. Skill points that are invested in accessible skill trees will remain in the skill. If you transition to a class without the skill tree, the skill point gets returned to you to spend it again. For example if you go Priest->Bishop will still have access to the initial Divine skill tree. But if you go Mage -> Bishop, will lose any investment in Arcane and able to reallocate the point(s) elsewhere (you gotta spend gold again, it works similar to the confession skill reset but only resets skills from the inaccessible skill trees).

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All rolls can be save scummed. If you save before rolling for an action (such as a level up) the results will not be the same every time you load from that point. This means if you want to min-max a growth that is 120%, you could save scum until it generates a +2 instead of a +1. This also means you can keep reloading a day until a master class assignment passes even as low as a 10%. Probably better to just increase the stat until you get closer to 30-50% though for your own sanity, unless you're really desperate for immediately utilizing that class.

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Growths

Skill Trees

• Greatsword
  
• Battle Tactics
  
• Adventurer

Growths

Skill Trees

• Sword and Shield
  
• Battle Tactics
  
• Adventurer

Growths

Skill Trees

• Divine
  
• Adventurer

Growths

Skill Trees

• Bow
  
• Scoundrel
  
• Adventurer

Growths

Skill Trees

• Dagger
  
• Scoundrel
  
• Adventurer

Growths

Skill Trees

• Arcane
  
• Adventurer

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Requirements

• 12 Strength
  
• 10 Endurance

Growths

Skill Trees

• Greatsword
  
• Battle Tactics
  
• Knight
  
• Adventurer

Requirements

• 10 Strength
  
• 12 Endurance

Growths

Skill Trees

• Sword and Shield
  
• Battle Tactics
  
• Guardian
  
• Adventurer

Requirements

• 10 Intelligence
  
• 12 Wisdom

10 Int 12 Wisdom

Growths

Skill Trees

• Divine
  
• Bishop
  
• Adventurer

Requirements

• 10 Strength
  
• 12 Dexterity

Growths

Skill Trees

• Bow
  
• Scoundrel
  
• Ranger
  
• Adventurer

Requirements

• 10 Willpower
  
• 12 Dexterity

Growths

Skill Trees

• Dagger
  
• Scoundrel
  
• Assassin
  
• Adventurer

Requirements

• 12 Intelligence
  
• 10 Wisdom

Growths

Skill Trees

• Arcane
  
• High Mage
  
• Adventurer

Requirements

• 10 Dexterity
  
• 10 Willpower

Growths

Skill Trees

• Bow
  
• Scoundrel
  
• Arcane
  
• Bard
  
• Adventurer

Requirements

• 8 Strength
  
• 8 Dexterity
  
• 8 Endurance
  
• 8 Willpower

Growths

Skill Trees

• Battle Tactics
  
• Monk
  
• Martial Art
  
• Adventurer

Requirements

• 8 Strength
  
• 8 Intelligence
  
• 10 Endurance
  
• 10 Willpower

Growths

Skill Trees

• Sword and Shield
  
• Battle Tactics
  
• Divine
  
• Paladin
  
• Adventurer

Requirements

• 10 Strength
  
• 10 Intelligence

Growths

Skill Trees

• Greatsword
  
• Battle Tactics
  
• Arcane
  
• Arcane Knight
  
• Adventurer

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All master classes require a trait. Said trait is gained by an assignment which will favor a particular stat or multiple stats. I don't have the information of what numbers translate to what % roll on the assignment but I've managed to get a Saint at level 12 or 13 (30% chance) and a Sword Master around the same for 50%. It all depends how blessed the character is in the stat. The higher the better. Since all master classes require a trait gained from assignment, I'll instead list the stat that influences the assignment success rate.

Tip: If you have an accessory that sets a stat to 40, those greatly boost chances. For example gloves of master thief for dexterity.

Requirements

• Wisdom

Growths

Skill Trees

• Divine
  
• Bishop
  
• Saint
  
• Adventurer

Requirements

• Dexterity

Growths

Skill Trees

• Battle Tactics
  
• Martial Art
  
• Sword Master
  
• Adventurer

Requirements

• Intelligence
  
• Wisdom

Note: The trait required for Witch gives an additional Intelligence Growth of 10%

Growths

Skill Trees

• Arcane
  
• High Mage
  
• Witch
  
• Adventurer

Requirements

• Strength
  
• Endurance

Growths

Skill Trees

• Greatsword
  
• Battle Tactics
  
• Knight
  
• Dragon Knight
  
• Adventurer

Requirements

• Wisdom
  
• Dexterity

Growths

Skill Trees

• Bow
  
• Scoundrel
  
• Ranger
  
• Beastmaster
  
• Adventurer

Requirements

• Dexterity
  
• Willpower

Growths

Skill Trees

• Dagger
  
• Scoundrel
  
• Assassin
  
• Reaper
  
• Adventurer