I will look into this more in depth tomorrow morning. But i am in agreement with Kim about the Duel ring with that being said however I could still mention the dunge ring as an alternative for those who are a little more stingy with money. With regards to summoning I will have to look into them since when I got 99 prayer i just used a tort and my own house alter. With regards to the mention of wyvern bones I do see were your coming from however, I'm not sure it should be noted since prices are subject to change as well it is a prayer guide not the herblore guide... What I will do there is make a little note saying that they are also used to make super prayer potions but I will not make any preference with regards as to which someone should do.