Classes

How about:

Baseline:

• whatever hp
• proficiency is just plain +4. deal with it
• enhanced get a feat per level, but prefer their OP feats
• practitioners get 2 spells and 2 mana per level, and no feats (or maybe they can choose 1/1 + a feat)
• heroes get, at alternating levels:
  • bonus proficiency
  • bonus feats
  • bonus skills (expert, mastery, etc)
  • bonus HP
  • hero points

Another way of looking at it, is that each level, each class gets:

• Hero
  • +0.5 proficiency
  • +0.5 hero points
  • +1 feat (or skill)
  • +whatever HP
• Enhanced
  • +1 ability score mod
  • cool super feat
  • probably loads of HP
  • 1 mana
• Practitioner
  • 2 spells known
  • 2 mana
  • 1/5 increase to max spell rank

Benefits Per Level

Shared

Benefit	Enhanced	Hero	Practitioner
Hit Dice	d10	d12	d6
Hit Points	6	7	4
Mana	1	0	2
Feats	1	2	0

Exclusive

Benefit	Enhanced	Hero	Practitioner
Stat Add	1	-	-
Hero Points	-	1/odd level	-
Proficiency	-	1/even level	-
Spells Known	-	-	2

Feat differences per class

Enhanced have special, unique, powerful feats (e.g. Vampire abilities).

Practitioners get no automatic feats, but they can sacrifice 1 spell known and 1 mana for a feat.

Heroes can use their feats to gain:

• Expertise or Mastery in a skill
• Another "good save"

Anyone can use a feat to gain:

• Proficiency in a new skill (or tool, or weapon/armor, etc)