As Sniddy pointed out, you gather quiet fast the first 50 gems and hope for luck for a 6 star or atleast multiple golds or the character you want, in my case i got no 6 star in any and got different golds on the accounts after all that i got pretty fond with each account and they aren't any hard to manage with this auto run playing 2 at a time playing one at firefox and the other at google chrome.