Board Thread:Questions and Answers/@comment-25857677-20190205000237/@comment-38196594-20190205043947

There's always Spartacus + Arash who can charge their own NP and with the right CE / Support servant, you can NP almost immediately. They are 1 star servant, so their damage output might be lower than expected, but still enough to clear the daily exp node.

Commonly, they are the go-to servant for farming purposes. Other than them, there's Darius and Kid Gil (Both has Golden Rule and AOE Buster NP).