to Не Герой
So, I think that the main costs in this tournament are related to choosing the path and tactics in some battles, which takes much more time than the actual execution of the task... therefore, it is probably unrealistic to achieve a good result in this tournament in five hours.
Besides, I played for fun, because I enjoy the game, and playing the same thing over and over again for hours is too boring (as someone here wrote, spending 15 hours defeating Phoenixes).
Although, this is my first tournament, maybe I'll play a couple more and change my mind.