Board Thread:Game Discussions/@comment-62.101.0.30-20170324152615/@comment-27862737-20170502200221

FYI, I did a few fusion/combines on EU and ended up with armors I already had (1st gave me the Phoenix Ward, 2nd Jurassic Scalemail, 3rd Witch Doctor's Wargear).

So yes, it can be done, but I'm guessing there's a large amount of randomness to it, just like Global. And it appears that you can only fuse armors from the same Season with each other - you can't fuse/combine from Season 1 with Season 3, for instance.