You are very lucky to have found something that works for you. I know for me and many here who had their dp/dr worsened taking SSRIs especially.
I've tried Paxil, Prozac, Lexapro. What they did is not only numb the anxiety and depression, but also all other emotions thus worsening the dp/dr. I dissociated so much especially on prozac. SNRIs did the same but at least not as bad as SSRIs were for me. Pristiq made me energetic but a little anxious though. Since we respond to meds differently, I'd say you should try an snri. You'll never know until you try it yourself. It may work for you better.
Only lamictal didn't have the effect of emotional numbing on me, it helped somewhat with dp.