I think it would be nice to try and have the best of both worlds for these 1 off anniversary raids. The challenge is to make the raids both challenging and inclusive. How could this be done is the question. POW was a unintended patten I think they should follow. A.). Increase the duration these 1 off raids are available B.). When the raids are introduced make them stupidly difficult. Only the best most organized guilds would have a chance to win . C.). Have an intended schedule for nerfing the difficulty of the raid to a reasonable end point. (Say once a week on a set day) This way guilds that want a challenge who beat it early can have their fun / bragging rights and have a bit longer farm cycle. As the difficulty drops more and more guilds can be included in the fun of the event. This model would give a nice way to rank a guild for the event. Just a thought .