Your title, it says weaponsof mass destruction, but your talking about spells, arrows and prayer. #-o There are all ready too many spells as there are, Normal, Ancient and Lunar. Adding up to a great amount of spells... There are many forms of ranged tools, darts, knives, and a selection of arrows. Most of which you can make stronger via poisoning, same goes for darts... Prayers, They are already powerful as they are... Have a wounding prayers would just be nercomancy...(which is against the suggest rules.) Altough there may be many weapons. eg. swords, axes, daggers etc. The list of weapons goes up and though bronze to rune, with the exeption of bone, dragon, obsidian, abyssal(whip) and Barrows I would think that, the abyssal whip and barrows are the super weapons of destruction in this game.