Is anyone else having a hard time with the dews on regular Adventurers?

Yeah, first part took me around 12 hours to finish.
I'm at 5/10 of the 2nd set already with only hunting for 1 hour.

This is on constant 4x (Card + Lucky Winter) btw.

Finished 2nd set within 2,5 hours of 4x drop, got 2 every 30 min. o_o
3rd set is a bit harder again, found 3 lights within 2 hours.

Edit:

@ Dark Link or anyone else who did the 3rd part; What map did you guys hunt in?

To both of you, what class did you use to get the dews? I'm a thief, and I keep hearing they can't find them.