Board Thread:Question and Answer/@comment-25343141-20140917223139/@comment-25408031-20141008233752

What he said ^ Basically what i do is max the level of my HN/HR/HSR/(don't have URs ;_;) and then use N cards as fuel to upgrade a card with Forced ATK and Forced DEF until i get to 19999, it costs around 40k rare medals to do this, i suggest researching the cards closely and asking around for the best setup of your cards for what you want to do.