So, you're basically saying you're struggling with breakthrough? Although it wasn't a far fetch to complete your daylies when you did the event dungeons, so if you bothered to go that extra mile, you should have enough materials at hand to get at least somewhere with those Jewels.
Like my preposter put it, the 3rd spec is a new accessoire set that was unavailable during the event period, so it shouldn't be qualified for upgrading with the event materials.
And by the way, the patch notes did explicitly specify which accessoires the Jewels could be used on. Granted, it's pretty unfortunate, that most of the items have the same name, but fundamental logic + the knowledge that NCSoft is pretty cheap would easily tell you that what you're trying was definetly not gonna work.
For some instances, you should be glad it's not like this, because if you'd allow these Jewels to be used on the third spec, you'd also have to use the other event tokens for breakthrough, which can be transmuted now, but I'm pretty sure BT accessoires didn't require Premium Transformations Stones before the event came.
Also, pots don't get to call the kettle black. :p