Board Thread:Help Board/@comment-27704224-20160130162548/@comment-26336535-20160130165033

My suggestion would be to get Selena or Shera's 7* first. Shera's 7* has a massive hit count along with BC regen, which is helpful for future Mecha battles. Selena's 7* is amazing for Arena and can solo the Mechas on autobattle (though it takes a long time).

As for your squad, the first reply is good. Though, most people seem to have trouble with survivability, so for a friend, I think using one with health and BB fill would be helpful, such as Bestie.