Monk weapons

[Kutsumo]

This is just IMO:

2x Jade Mace from lvl 1-9 - just sell these or throw them on a mule after b/c you're done with them.
Adamantite Club + SoS lvl 10-29
Imbued Fighters Staff 30-50* (Ada/SoS will do similar DPS, but you'll take more damage from ripostes when soloing and generate more agro in groups. Swap them out as you desire.)

I recommend the IFS because it's only 4 stones and is marginally "worse" than the 10 stone Tstaff or Peacebringer. IFS is also easier to do the offhand swing trick with because it's slower.