I´am playing as Life Mage and often use Barriers from Lumiscens and Holy Bulwark. Until the time I have managed to expose some bugs:

[ul][li]Sometimes Barriers don´t get lost after they reach 0 “HP”[/li]
[li]The amount of “HP” an Barrier have is randomized sometimes, best to see using Lumiscens[/li]
[li]If I use Holy Bulwark and an Monster has already an Barrier, nothing happens. But if I use Holy Bulwark twice using Multicast, all of the Monsters get a barrier an by the second use they get an boost on their Barrier[/li][/ul]

Thats all, I think.