I think the first step to solving the problem is to categorize.
What are the archetypes of non-magical purely one "class" warriors?
Here is my list.
- Artist The Warrior who focuses on creativity and innovation to come up with new styles
- Key Ability: Intelligence
- Important Skill: Knowledge skills
- Common features: Improvised Attacks,
- Reliance on Supernatural at high levels: Low. Can transition to skill monkey or rely on invention to bypass obstacles
- Brute- The Warrior who focuses of pure strength and power to break obstacles
- Key Ability: Strength
- Important Skills: Athletics
- Common features: Super Strength, Super Toughness, Rage
- Reliance on Supernatural at high levels: High. The Brute has to be as strong as Everything is everything
- Bully- The warrior who focuses of ruthlessness and intimation to break spirits
- Key Ability: Strength Charisma
- Important Skills: Intimidation Athletics, Persuasion
- Common features: Aura of Intimidation. Super Strength, Super Recovery,
- Reliance on Supernatural at high levels: Low. The inanimate can't be bullied. Can transition to skill monkey or rely on invention to bypass obstacles
- Knight- The Warrior whose devotion to a warrior culture or religious idea forces them to hone their strength
- Key Ability: Varies depending on culture
- Important Skills: Varies depending on culture
- Common features: Shiny Armor or Half Nekkidness
- Reliance on Supernatural at high levels: High. Eiter they dip into some sort of mystical force or a supernatural force gifts them magic items
- Juggernaut- The Warrior who focuses on defense and toughest to withstand onslaughts
- Key Ability: Constitution Wisdom
- Important Skills: "Endurance"
- Common features: Super Toughness Super Recovery Super Armor
- Reliance on Supernatural at high levels: High. They have to be able to take anything the world throws out
- Speedster-The Warrior who focuses on speed and agility to bypass obstacles
- Key Ability: Dexterity
- Important Skills: Acrobatics, Stealth,
- Common features: Super Speed. Super Recovery.
- Reliance on Supernatural at high levels: Moderate. Depends on how fast they have to be.
- Technician- The Warrior who focuses on perfect execution and accuracy to perform the already perfected
- Key Ability: Dexterity, Intelligence
- Important Skills: Performance
- Common features: Super Accuracy
- Reliance on Supernatural at high levels: Varied. As dependent as the establishment.
- Trickster- The warrior who focuses on deception and trickster to confuse and rattle foes
- Key Ability: Charisma
- Important Skills: Deception Athletics Persuasion
- Common features: Varies. Trick Shots.
- Reliance on Supernatural at high levels: Low. The inanimate can't be tricked. Can transition to skill monkey or rely on invention to bypass obstacles
Based on my list,the Artist, Bully, and Trickster can go without magic or supernatural by leaning on being a skill user.
The Juggernauts will reliant on magic and supernatural more often for hardness, immunity, and resistance.