Which tire and link or chains do you recommend?
I learned long ago not to actually "recommend" anything when it is so much a matter of personal preferences!
But I will tell you what works for me, and you can take that for what it's worth....(We have an RV-6 and an RV-8, both with stock Van's tires and Silver bullet links. One has an API fork, the other the Bell.)
Personally, I don't think I can tell the difference between tires. When the tire gets worn down to nearly flat, I can imagine I get a little less shock absorption on bumps. But for me, a tire is a tie.
I have flown pretty much all the combinations of links/chains. My preference is for a very tightly coupled tail wheel - I don't like play in my controls, so when I had chains, I had them very tight. I really like the Silver bullet - it is fairly rigid, but has springs, so it has some give to it. Note that you can't seem to get them anymore - JDAir sells one that (I think) is pretty much a replacement for it. The only problem I find with really tight chains (other than that chains look sorta frumpy) is that it is easy to wear out the attach points on the rudder horn - you'd need to use clevis ends or something.
In summary, from a flying standpoint, I don't think tires make much difference, and the rest depends on your personal preference for control feel.
Paul