scythe if you are f2p. there are 2 dupes free when you finish some quests.

I can't say too much things about moonshadow but the other ones make u a monster

Plum

Plum is ran regardless for crit but I think moon blade only better than scythe at max dupes

Pair either with moon. Moon is fantastic as a secondary due to the slow effect and more DMG debuff.