Board Thread:Questions and Answers/@comment-26196925-20160102095932/@comment-25669516-20160102175554

You can only buy the Silver Flak when someone kills you with it in Multiplayer. And yep, unless you are the in-app purchase  kind the clothes you mentioned are definitely the ones you should get. They are indeed the best protection you can buy in coins.

Save the stars you earn from leveling up and events for purchasing or upgrading weapons. And under no circumstances spend them on lottery or elixirs