Not entirely sure which trinkets I should be using, at the moment:
Baleful trinket (695)
+291 Mastery
+291 Bonus Armor
Splendid Skettis Sapphire (650)
+226 Stamina
+191 Bonus Armor
100-110 BoA trinket
+351 Versatility
100k shield on-use, 1min CD
Currently using the top two; not really sure how useful the BoA trinket is. Swapping it out with the 650 stam trinket, I lose ~1.5% armor and 18k health, but gain about 1.5% damage reduction from Versatility, so...I suppose it's a question of 18k health VS 100k on-use shield, there.