In Fable: The Lost Chapters what augmentation gets damage up the most?

I have been playing Fable: The Lost Chapters because I have found it more stimulating than Fable 3 even after I beat it like seven times. I guess I have the strongest sword in the game, The Solus Greatsword. I bought It for so much money, but I didn't realize I had put some augmentations on The Bereaver sword that made it the same strength as the Solus Greatsword, 314 damage. I want to get an augmentation that can boost it's damage so that I can have the strongest sword actually be the strongest sword, plus I spent all that money in Bowerstone North. The sword already came with fire and sharpening augmentations so I only have one slot left to put another in. Which one will boost it's damage the most? Please answer this question. I know a lot of you will not want to because this is a really old game in all, but not a lot of people ever answer my questions and if they do it's usually not very useful. I really want to know this please!