How good is this trinket?

Corrupted Egg Shell
Binds when picked up
Unique-Equipped
Trinket
Requires Level 83
Item Level 333
Use: Places Egg Shell on your current target, absorbing 4060 damage. While Egg Shell persists, you will gain 420 mana every 5 sec. When the effect is cancelled, you gain 5040 mana. Lasts 30 sec. (2 Min Cooldown)


I am currently using
Tear of Blood
Binds when picked up
Unique-Equipped
Trinket
+215 Intellect
Requires Level 81
Item Level 316
Equip: Your healing spell critical strikes have a chance to grant 1290 spirit for 15 sec.

and
Blood of Isiset
Binds when picked up
Unique-Equipped
Trinket
Requires Level 83
Item Level 333
Equip: Increases your mastery rating by 252.
Equip: Your healing spells have a chance to grant 1512 Spirit for 20 sec.


Do you guys think the egg trinket is worth using? If so, which one of my trinket should I switch out.