For a stable start, I chose Shaka, and he did quite well, clearing out machines and reaching level 13 in the first week. Argatha arrived late and simply ran around, gathering experience. I leveled her up to 7 without fighting, and on the last day, in the forest, she acquired some units. On the first day of the second week, I was already clearing the map with two heroes, killing almost everything in sight. On that same day, I received a message that my opponent had surrendered.
Thank you for the game!