I dont believe you can spend any points to increase the level of the trinkets you can craft, am i wrong? Havent been able to find anything.
Agreed. I have not found any specialization that contributes. It seems like they should add general trinket skill to Archival Additions and Cryptic Collections, since Darkmoon cards are also trinkets initially.
Pursuit of Perfection and Improved Ciphers provide +skill to PvP Trinket crafts.
There should be one more somewhere because with those two wheels maxed out it gets you to 435 skill when you need 475 skill for the Epic Heraldry.