In order to get all Grandchase character (most likely in my opin
First Would be to level up a character to around level 30. Buying Dio or other high level characters would work. Then first get Seigheart. In my opinion Sigheart isn't so cool what's the difference between him and the knight girl in red. So I wold get Ryan then Lass then Seigheart then Jin then Amy then Mari then Ley then Dio then Zero. Oh yeah I'm artyrockoll, if this work's out please join guild RoyalFire.
From what I see the easiest way to make a lot of money it's buying somebody like Dio Ley or Zero or any other future characters that will start at a high level and than from there just do some high level missions.