IM THRONEBREAKER!! What now?

I just hit throne breaker and now I’m a little confused on what I should do. Should I try the easier Carinas challenges? Should I try 7.1? Or should I build my roster before I try anything? 

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That's what I've been doing, at least.
With the 7 for 7 u can get another 7* and open the firts ftp Titan crystal.