You might like the Personna Med Prep or Lab Blue blades. Those work very well in my Tech razors and the AS-D2 has many similarities with those. Smooth is a good description.I'm also seeking a smooth replacement for my Gillette Platinum Plus (no longer in production) which I use in my AS-D2, so this thread is interesting for me. I will run out of my current supply in about 8 months, after about 3 years of using them.
I fear I may have to go back to sampling blades forever since my previous regular was KAI and I find those too harsh now. In my experience, I think Gillette Silver Blues and Bolzano are probably the closest. Bic has been hit or miss and I suspect quality control is the issue. I wasn't impressed with Astra. I might have to give Derby a try.
My goal is no skin tears rather than BBS. I'm fine with somewhere between a DFS and CCS.