What exactly is the point of having nothing but strength on the Kellslayer set? You don't get anything special for having 500 strength. The set needs a little bit of diversity when it comes to the attributes. Unfortunately, as it is now, the set does not allow for any diversity when it comes to builds. Your guardian just ends up being a straight up punching machine who is severely lacking in every other respect. I would understand if having strength beyond the cap would give you an additional bonus, but it doesn't.