watched the Galtaran vs. Tazar battle from the first post.
As someone with extensive experience judging arena-style battles, I can say the following:
As practice has shown (Tazar won the first battle, followed by two draws), with proper play from both sides, the battle boils down to a magical endgame, where a mistake by either side sends the main heroes back to the taverns. The magical endgame is also not straightforward; Galtaran summons many earth elementals, but in our last battle, there were very few left - unfortunately, no one saw it :(