I don't think there needs to be a raf guide. Non-raf, maybe. I'd rather just have a text guide, like they have on wow-pro though. The only exception is for excessive grinding spots, like if you're repeatedly running instances, then videos showing them are good. http://www.wow-pro.com/death_knight_aoe_how_to has two good examples. Always include text because it isn't always obvious what you're doing or why you're doing it.