Heya folks, looooooong time lurker so, hey, here's a lil contribution.
This was a little bit of an accident, but I'm assuming it's the same principle as the multiple vicious saddle thing.
I completed a Chosen run this past weekend, and I'm not sure if it's just the mythic ToV completion or if it's the chosen achievement, but after the raid Hymdall mails you the mythic ensemble. I ran this on a paladin, but I had another account with a level 64 mage logged in AH'ing. When I went to mailbox to collect auctions I noticed that I had a box from Hymdall and it was the mythic ToV cloth ensemble.
Not sure if you can reclear it on a toon that's already cleared mythic ToV or not, but, a little neat thing you can preplan to cut down on how many toons you have to run.