Easier said than done. First off, Iron Banner is a Thorn/Lag Fest (at times it is straight up unplayable). Secondly, most folks don't have the option of sitting at home and playing PvP all day (most adults work for a living). Lastly, not everyone is in a clan or has friends to play with every week...this leaves a player with few options. Bottom line, Etheric light should be easier to obtain.