My current concern is about the tier 15 trinkets, all of them are... awful from a blood dk perspective as far as i've tested.
Soul Barrier has a nice amount of stamina and will be used by pretty much by everyone but the on-use absorb i've only found it useful on things like horridon's combo breaker (melee+triple puncture+dire call), and it is lackluster even there.
Delicate Vial... i can only see it being used for challenge modes since it's usually bad idea for a dk to tank great amounts of adds on a raid enviroment, not to mention that a 4% proc chance on dodges makes it completely undesirable for single target tanking.
Ji-Kun's Rising Winds. The 40-45k heal is barely noticeable, you have better panic buttons to press on that threshold and if you spiked so low chances are that you procced purgatory and that heal will actually kill you; besides, blood dks gain very little from expertise beyond 7.5%.
Steadfast Talisman is barely decent but rng can still mess you up.
Fortitude of the Zandalari is the best one so far and self explainatory.
Spark of Zandalar would be the only dps trinket suitable for tanking (although not optimal), but you obviously shouldn't take it over your dps.
I'm currently using Soul Barrier with H;Vial of Dragon's Blood, and i can't really see any of these trinkets as an upgrade except for Fortitude of the Zandalari.
Thoughts?