Canthan staves.

The Halcyon Job (sp?) out of Zos for Dragon staffs and Bo staffs...330 rit works well Ill second that, although havent done it since the skills nerf on them Sin's, now they actually hurt my ele.

Dont hold this against me, but im PRETTY sure that Platinum Staff's are a Shiro'kin drop, if i remember correctly ive had a few from Raisu Palace chest running. Ive 100% had Platinum Blades and Bows from there. Of course thats also good for Forbidden.

I personally do Minister Cho's Estate for Bo Staff's. Had quite a few there, no decent ones though, all Q13 crap :P

Ive never had a Dragon Staff, but heard the MASSIVE mob of Jade Brotherhood in Wajun Bazzar or whatever is excellent for that.

Outcast staffs i would say SoS in Rheas Crater. Had a few, if i remember correctly. Or when Jade Swords first came out i Chest Ran outside Seafarer's rest if i remember correctly, had LOADS from there, always sold them though ( was like 2 years ago...come on)

Plagueborn are really crappy to try and get. Although Zen Daijun is proberly the best, my friend farms there on occasion and said its alright.

And for the record, Echovald Shields and Gothic Defenders are proberly not worth farming. Ive done 400+ Dragon Moss runs and had 3 Echovald Shields and 2 Gothic Defenders, and ive only kept 1 Echo shield that wasnt worth selling to the merchant. Even thats Q12. And my baby Q8 White Gothic Defender

Anyways, i hope ive helped out a bit!

Dont hold this against me, but im PRETTY sure that Platinum Staff's are a Shiro'kin drop, if i remember correctly ive had a few from Raisu Palace chest running. Ive 100% had Platinum Blades and Bows from there. Of course thats also good for Forbidden. I used to farm platinum's outside of the Harvest temple
55 monk with Ancestor's Visage and Sympathetic Visage (shiro'ken rangers use famine)