I'm using Deepseek directly into Sillytavern and it works fine for me. For story generation, I am not finding much of a difference between reasoner and chat modes. No mention of ozone so far, but it still uses the same tiny pool of character names. It did surprise me once with a line regarding a bunch of women in a harem competing with each other for their master's favor. Something like "A gilded cage full of birds so obsessed with occupying the highest perch that they forgot what the sky looks like."