http://guardiancross-forum.com/Thread-Day-1-to-100-Guide-to-Becoming-competitive
http://guardiancross-forum.com/Thread-Trading-Guide-FROM-0-to-Hero
By Galucien
They both involve heavy trading. With the bad drop rate of 5* in special hunting tickets, it is going to be necessary to get competitive fast.
Warning: Trading may also get you banned if you end up with"illegitimate"cards. A lot of players were banned this way. Ironic and one of the biggest problems to the game.
iTunes App Store link: Guardian Cross - SQUARE ENIX