Wizard – “Hope of Zephyr” [Campaign 6, Mission 5]

My Findan was the most effective against the Master, second only to Zephyr, who won the entire battle by casting "Banish" once.
It's just that Findan is the easiest to level up. There are many opportunities for this in the Elven campaign, plus he doesn't miss the best leveling missions from the sixth campaign.