If all you want is clusters then the easiest will be Mor Dhona which six nodes a day for any element you want. Aetherial reduction is still more yield than camping Mor Dhona.
Levin Mint and Thunder Rock actually have three spawn times each per day. The only issue with reduction now is that collectability is currently broken in Miqo because of the game update. You will either need to have a gather sequence with key()
in the scenario or gather preset macro, but there’s no guarantee you’ll get high collectability for good reductions.
If you mean outdated by collectability being broken, Miqo needs to update or macro it.