• Rank on 0, 5, 10, 15, 20
• Skill on even levels (+4)
• Feat on odd levels (+1)

Feats cover:

• subclass abilities
• racial abilities

Fighter:

• skills = profs
• feats = well, feats

Caster:

• skills = spell school
• spell knowlege = resources, not class abilities
• mana = ???

Mana is an HP tradeoff?