We've always played that Str mod damage means Str mod damage and nothing else. Can anyone come up with a bonus that *does* get added?
by you and many others...There are damage bonuses that add on a hit, too.
These bonuses don't apply to Magic Missle (no attack roll), the Cleave damage that isn't applied to the main target (no attack roll vs these target) and not after missing with Reaping Strike (you didn't hit).
This is why the new Magic Missle is regarded as a bad power.