Board Thread:Game Discussions/@comment-216.163.8.174-20131215191444/@comment-24003134-20131217034438

Epic Boss Armors: Can be obtained through defeating the epic boss to 15 and crafting the armor. Level the armor to 35 and you will unlock the plus version of the armor. If you can manage to defeat the epic boss to 43, you can craft the plus version.

Other Plus Armors: Can be obtained through Chests, Tournaments, Guild Wars, Arena and limited time events.