Some patience, some thinking, truely strategic
This game is one that takes a little bit of patience to fully figure out. After you do it becomes a very interesting game to mix and match units to create different strategies.
For example, using the attack up and pheonix spell at the same time will wipe the playing board clean. For everybody who feels the massive influx of units at the end when damaging an enemy castle is impossible, use this to devestate them.
Or you could use tanks. The tanks are VERY useful units. Having just 2 in the background will keep your enemies juggled in the air, bring in some archers and other long range units coupled with 2 tank type units up front and you've got a pretty brutal front.
Just randomly putting cards together won't work. Think about what these cards do and how to best use them.
Overall, I loved this game.