This is a caster specific question, but rather than cross-post in several forums, I figured I'd ask it here:
I had a caster request Shattermantle from melees in a Shroud, so he could debuff the raid boss. None of us happened to be carrying it, but it got me thinking.
How much does Shattermantle help casters against raid bosses?
I don't (currently) carry it, but if it will significantly help a caster debuff a raid boss, I will. I see some (maybe 50/50?) debuffing of the Reaver, for instance, but about half the time casters don't bother (I end up Ray of Enfeeblement-ing from the Staff of Arcane Power and spamming a cursespewer, which is inferior to a real caster curse because it only lasts a minute or so).
I'm very fond of finesse rather than brute force approaches to quests in general, so...should I carry Shattermantle? Should I just reserve it for guild raids, where we can discuss tactics ahead of time? Discuss it with the casters before we actually enter the raid, then grab it from the bank as needed? Or is Shattermantle basically junk in raids and I should forget about it?