Personally I’m loving both the Star Trek ongoing, and Star Trek: Defiant. I haven’t read the Dog of War series at all though.
If you’re looking for DS9 content specifically, Star Trek: Defiant might not scratch that itch for you. It’s got Worf, and it’s got the Defiant, but that’s it. The rest of the crew are characters from other series.
Star Trek is the book about Sisko returning from sojourning with the Prophets. There’s definitely some interconnectedness between the to titles, though.