Subclasses that have no skill requirement. Something similar to a job system. Maybe as a Talent.
Alchemist/Apothecary
Has kowledge to more advanced potions and flasks.
Can apply poisons on weapons of himself or allies.
Can throw potions on the ground to use them as flasks, with weaker effect.
On a very rare occasion (rare ingredients) he can craft potions that enhace characters permanently. Attribute, Civil or Skill points. Talent would be too strong.
The only class that has a chance to craft a potion of a higher tier with low tier ingredients.
Has a low chance to convert stone into gold. On a failure he gets poisoned and transformed into a frog (which would kill him if not healed very quickly). For shits and giggles.
Blacksmith/Armorsmith
Can upgrade the Weapons/Armor level. Remember picking up an amazing item early game but now the level is too low to use it?
Can upgrade the rarity of an Equipment Item.
Can add elemental damage/resistance to a weapon/armor.
Has a larger weapon/armor crafting table.
Can craft special Unique weapons.
Goldsmith/Jeweler
Has access to more rune Frames.
Can craft rune frames.
Can combine runes with each other.
Runes crafted by him are more powerful.
Same as Blacksmith: More recipes, can upgrade accessories etc.