Final answer:
Nic agrees to join Radulf's house and become part of the Praetor War because he believes he can balance the inequality of forces by using guile and cunning.
Step-by-step explanation:
Nic agrees to join Radulf's house and become part of the Praetor War because he believes that he can balance the inequality of forces by using guile and cunning. He knows that he does not have a powerful enough army to resist Commodus directly, so he plans to use deceit and trickery to achieve his goals. By joining Radulf's house and becoming part of the Praetor War, Nic believes he can gain the support and protection he needs to successfully oppose Commodus.
In the context of the historical information provided, key themes emerge regarding political maneuvering, citizenship rights, and Roman legal proceedings. These themes reflect the complex nature of Roman society and its legal complexities, which could be related to motivations for joining a particular faction or war, although explicit connections to the main question cannot be established with the provided data.