Is there a cooldown on this spell?  Seems pretty powerful when used with the discipline talent "Improved Inner Fire" Rank 3 which boosts its effect 45%.  At 60 that would be 1954.6 to Armor (1348 + ( 1348 * 0.45)).  I'm not in beta so I'm really curious how Armor affects PvP (could care less about PvE).  Obviously having to renew this buff every 3 minutes while on the run would be a pain, but if that huge of an armor boost means assist trains shred me less easily, I'll happily tolerate it.  :)