I had DeathBlow(3) on my Sword Of The Gods, found late in the game. However, DeathBlow shakes the screen, which I disliked; had this happened more frequently, I would have had to re-load a previous save.
In DD there are no direct damage boosting bonuses you can see listed on an item, but if an item has the best available damage range for a weapon, it will tend to have fewer bonuses, while weapons with lots of bonuses tend to have lower damage.
