Grinding for Uniques

What's a good instance to grind for Uniques in Act 4?

Dried lake. But... why would you want to grind for uniques?

It doesn't really matter what zone you're in, with the exception of farming divination cards. There's only a few drop restrictions on uniques, and there are no zone specific uniques outside of ones that drop in specific areas accessed through the map device (atziri, breachlords, pale council, etc) or through league specific mechanics. Uniques are restricted by drop level in other content, and some can only drop in maps of a specific tier or higher.

I would recommend aqueduct in a4 because it drops cards that grant tabula rasa and carcass jack. Otherwise dried lake is best for speed clearing.

good uniques drops are very rare, there is no point in grinding for that..

if you mean grinding for specific uniques for the purpose of solo self found, we have divination cards

Cool