tyre choices

[Oilchange]

Few questions if I may,

1. What List 1a/b tyres are people choosing to black about on track with?

2. What's the best usable wet tyre if you can't use cut slicks? ie is shaving/buffing back the tread blocks on a road tyre still a thing?

3. Are Zestino Gredge from DT any good, they have my sizes and are reasonably priced so...