This tournament, except for using Ninja in the second round, I used the helpful guide and tried to use only dragons that fit the particular battle. That's about the only "logic" that I use. Do I have a lot of losses, yes. But I don't care about that. This was my third full tournament. In the first tournament I entered I did use gold to win one round. The last two tournaments I won with without using gold to win a battle. I had fewer losses this tournament than the last. Is it because I'm using more "logic" to pick the dragons or just dumb luck? I don't know. What I do know is that I enjoy it and as long I do i will continue to participate.
In the last two tournaments I only used gold to speed up some rounds. That was my choice, it wasn't really necessary since we have 5 days to complete the tournament.
Congratulations to those who completed the tournament and continued good luck to those still in the fight.