SupremeTentacle wrote:Edo patch is coming in a few weeks, so, seeing as how you're level 70, consider the Lv. 108 Satan golds.
Good luck.
^
Pretty much this.
However, if you really wish to grind current content weapons, it really depends. As of now, the current best weapons are the crafted ones from recipes via Aramitama Juncture at Floor 50 (Lorelei, Nothung, Genobuster, Beowolf etc). They're a big pain to craft if you didn't already prepare for it, so I would recommend-like said above- waiting for the Edo release and then trying to craft those weapons instead.