With the decrease in arcane duration the new parazon changes are going to be ignored. We can not maintain the arcane buff if we have to use the parazon. Which also means that the arcanes are useless for lich hunting.
Will the duration of the paragon kill animation be decreased? Since the new arcanes duration between kills has been shortened there is absolutely no reason to use the paragon for kills outside of lichs because we will not be able to maintain the arcane buff.