Hope you like the following 2moons guide which selected from the other website by me, but it's not my work, 2moons-diljust give it a summary. Hope it can help you some.
You can Farm the Level 18 and 24 Staffs by Separate Weak Bosses in the Corners of Loa. As for the Level(2moons gold) 30 and 36 Staffs and up, we think only good Level 30 and 36 Weapons can only be dropped by Monsters around those Levels, or possibly the Parca Bosses, but very low chance.
Given that these are Low Level(2moons dil) Staffs, with crappy gems the Success Rate is Pretty High and Cheap to Socket them which also makes it easier on us. Sorry but since we do not know the exact Stats of a 130 Twin Blade we can not Remember if you ever need a Level 36 Staff, maybe you do? but we can not remember off the Top of our Head while at work.
But for the Most Part if you are going a TB Hybird and you want to know what is the Highest Level Staff, for some people who just want to pump all their Spirit now and Use that Staff. We think it is either the Level 36 or 42, but we are not 100% on the Level 42 Staff.
If you wonder why we do not use a Higher Level Staff or really Recommend it is because really Palpus doesn't do a ton of damage where mostly it is used for the De-Buff, and Hell Burst we rarely use anyways because as a TB Hybird it is a Weak Skill.
At Staff Hybird gets no Bonus De-Buffs for using either TB Cosmos where both of them are just entirely Damage, meaning that if they were to use them to do as much Damage as they can they might want a Higher Level Twin Blades, it is might not saying 100% of them would and so on.
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