rapiers are still much better than shortswords that make dual wielder s tier feat
and str weapons are much better any way, you can make 16 str and 14 dex for ac in medium armor and get much better dps than shity light weapons xD or just use potion for 21 str its common potion
btw sword of screams are act 1 drop
Non existent rapiers are not better than short swords. Short sword is better than an empty weapon slot were the rapier would have gone if only Larian had created one.
Knife of the Undermountain King is available in act 1 Sword of Life Stealing begining of act 2. Good luck with useing sword of screams all the way into act 3.