Power - +5 to strength bonus combined with RS gold +5 crush. Defence- An additional +5 to each of the defences. Agility- I had been believing lower your weight by 5kg however there might be better options I did not think about. Construction- Less cost for planks/rooms. Cooking- I had been thinking less chance to burn but at 99 you likely won't burn much anyway. (Cook quicker is also an good idea people have suggested). Any ideas? Crafting- Less thread used. Fishing- Little opportunity on catching two fish at once. Any thoughts? Herblore- More opportunity for herb drops. (I could not consider anything better. Ideas?) Hunter- less opportunity for cheap OSRS gold the hunter critters to watch you/escape.