I have been toying around with the idea of using my necrotic focus (sp?) to replace one of my other trinkets (have Will of Unbinding, and Heroic insignia of the corrupted..), I know I wouldnt replace the will of unbinding with it, so that would only leave replacing my heroic insignia. It is an int drop (as well as that huge haste proc), but a 440 mastery gain. With the testing I have done on the dummies I haven't been able to tell much, if an,y difference yet. The guildies I have pitched this idea to have all said I should stay with the heroic insignia, but I would like to hear your opinion