You need 13 prayer to get barrage, its a prequest. Its 11 or 13 either way though youll have to get it if you want to go by plan and barrage+ gmaul spec
they are saying 13 because 13 is no combat difference from 11 and you get the strength boost prayer.
that is the route most low level prayer pures choose
they are saying 13 because 13 is no combat difference from 11 and you get the strength boost prayer.
that is the route most low level prayer pures choose