Does the Dusk Ball work in Dynamax Raids?
Dusk balls work in raids, yes (since raids are technically caves), and happen to be the best option in general.
Do ensure you use Net Balls if it’s a bug/water type, and Repeat Balls if you've caught the pokemon before, as those give better bonuses than the Dusk Ball when applicable.
Source: Various user forums.
As for the timer ball vs quick ball:
Timer balls are: (1 + number of turns passed in battle * 1229/4096 (approx. 0.3))×, maximum 4× (13 turns)
Quick balls are: 5× if used on the first turn of a battle; 1× otherwise
Essentially, use quick balls on the first turn, then timer balls around 10 turns in.
Do note that because of how dynamax raids work, using a quick ball will always result in a 1x capture rate according to this forum post.
Source