I am looking for suggestions on how to win in the arena. I have been trying to get the "300 wins" in the military set of achievements. The three criteria are "Player Ranking", "Player level", and "Rating". It seems that there is some winning relationship for each area. For instance: your player rating should be a lower number than the opponent you pick. The Red, White, and Green seem to be good indicators, but is choosing a "race" weaker than you, a better way to go... for instance, Undead versus elf ?