Jim and Marc will alternate running the arena battles. When Jim runs the arena foe, Marc will run Jim's character and vice versa.
The player's least favored party will be first in the arena progressing to the most favored party last. This way, the players can learn how the arena works with their least favored teams and save their best effort for last. Plus, it probably will help everyone to remain engaged to save the most interesting figures for last.
Arena Master's Slate
Jim and Marc will choose arena foes from a fixed XP budget and with certain restrictions that limit the highest level foe allowed, number of minions, etc.
The Arena Battle
See the description of the arena for details on arena setup, rounds of action, and judging the reaction of the crowd.