The solution is to save up as many level up items as possible and go for max Duel level ( reached when you start losing to to strong oponents ) . Then push Renew under Duels . That gives you a fortune in gold + some boxes and Gems . Use the gold , boxes and Gems needed to level up and seduce the cards . You also gain time from the boxes . Fight first before spending your loot . It is easy to go past 1000 inside the first hour this way . Keepan eye on how high the others go before daily reset then you know how much you still need to get in as top 1 to 3 that day in tournament and get the super cards as reward .