The Pathfinder SRD says that a skald's raging song lasts "for that ally's turn or until the song ends," and my GM is insisting that this means they gain no benefit from the song when it is NOT that turn, meaning that they gain no benefit from the boosted will save or the effects of the extra con (increased fort saves, hit points), or things like the superstition power.
I am inclined to disagree, as it specifically says "allies gain a bonus to will saves" and the very fact of Greater Skald's Vigor's existence. and he says that for it to work that way, I need to show him something concrete. Has there been any clarification on this? Can someone show me where?
EDIT: Also, can I grant powers I have gained from the Extra Rage Power feat to my allies?