1)"Benediction" no reducet mana cost on Seal of command.2)Understated chance SoC "Seal of Command procs "per minute" (ppm), rather than per hit - it will proc an average of 7 times per minute". (http://www.wowwiki.com/Seal_of_Command_ ... did=327126).3) Since Patch 1.11, Seal of Command proc will have an approximately 0.5 second delay
Sorry for my english