[GBF] Dark Manadiver Beelzebub Full Auto w/ Ouroboros Mino 

You should prioritize getting Ereshkigal if you don't have it already. If you do, keep in mind that Zosimos isn't nearly as strong or impactful as Eresh. Unless you're very heavily invested in dark it's probably best to just save your moons.

@sat122 I thought about eresh but seeing as I have hrunting which does everything I need burst wise I went against it. My dark is fully built with 3 halmal daggers so I thought I'd like a gold moon weapon to compliment it. Maybe I'll wait for rising force update to consider earth harp.

Saving is the move for sure then. Little sidenote: Zosimos likely won't open up any content for you but Eresh, for example, would still make a huge difference in Sandbox farming, given you have the necessary charas.

If you actively farm sands and have the needed supplies for the alchemy fragments, i'd say so.

It is worth it but you shouldn't rush it unless you're farming 6D 24/7 for sands.