Strength- +5 to power bonus combined with +5 crush. Defence- An extra +5 to all the defences. Agility- I had been believing lower your weight by 5kg though there might be better choices I didn't think of. Structure - Less price for RS gold planks/rooms. Cooking- I had been thinking less chance to burn but at 99 you probably won't burn much anyway. (Cook quicker is also an fantastic idea people have suggested). Any ideas? Fishing- Small chance on catching two fish simultaneously. Fletching- Again, not sure. Any thoughts? Herblore- More chance for cheap RuneScape gold herb drops. (I couldn't think of anything better. Ideas?) Hunter- Less chance for the hunter animals to see you/escape.