Try grisban as a knight - this class often helps to cover movement issues thanks to its skills who are movement orientated (oath of honor, advance, etc.) you still can give him hard hitting weapons instead of shields and he will wreck stuff =)
You can do that? I thought only the knight could use the knight cards.
You are correct. Once you assign a Warrior archetype the Knight class only he/she can use the Knight skill cards. What is the "that" you are referring to?