I want to start reading more Deathstroke comics but I’m not sure where to start.
Have you read the Judas Contract? It’s not a deathstroke comics, but he is the main villain and it also tells his origin in it. Very good storyline
The Deathstroke books in the Comics section are worth a read. As is the current ongoing series that debuted with Rebirth.
The current series is really good but a bit hard to get into if you don’t start at the beginning. I would say the best Deathstroke stuff are his early appearances in NTT
Current series is strong but also a bit of an acquired taste, if that makes sense. Priest has a very specific writing style that people tend to either love or hate.
My favorite Deathstroke story remains “City of Assassins” from # 6-9 of the 1990’s series.
The Deathstroke comics under the Deathstroke & Katana section are good. Wolfman/Perez’s TNTT run is Deathstroke at his finest with an origin included. Also he has a pretty good stretch in The Outsiders 2003.