Board Thread:Game Discussion/@comment-76.248.30.211-20130929201732/@comment-1063722-20130929213857

Clayplate Mantle should still be fusable after the update. Fusing legendaries can give you ultra rare or legendary. So you could get Swamp Shaman, Jackelope's Chaingarb, Mountainvine Shroud, Battlesuit Remnants, or Clayplate Mantle. You might be able to get some other mono Earth, mono Water, and Earth/Water legendaries, but they might not be any good.

Also, you CANNOT get a plus version of armor from fusion. Hope this helps.