No, he plays with all factions, both warriors and mages, and only selects those who are 100% guaranteed to win against your hero. I still don't understand how it's possible to manage to play (and win!) so many battles online, especially when it's not peak time. Besides, many who have played a few games with him don't come back – his lobbies are always empty. And it's impossible to win so many times – external and internal factors can influence the outcome, from a simple power outage or internet disconnection to a mistake in the game or a strong opponent. Most likely, he won the majority of his battles with a pre-arranged player, "boosting" his statistics...