I also assumed if you GEO melee you'd sub /NIN for dual wield and then you'll want to reconsider your earring and belt choices to cap DW.
DW /NIN, you'd probably be considering a DW+10 Ambu cape and leave it at that (79% DW). Your other most practical choice would prob be Suppa+Eabani for DW+9, which would be worse offensively and kills your ear slot flexibility.
Single wield, Null Shawl is pretty nice.
I do agree that Gazu already makes me a little nervous due to poor defensive stats, so using that along with another armor slot with mediocre defense isn't great.
Kind of reinventing the wheel needlessly from a GEO perspective though. 5/5 Nyame for 20% haste, solid acc and some other offensive stats from augments (DA from B path), and keeps you nice and safe. Get the last 5-6% from belt or ring, whatever you like. Arguments for either one, really, and if you care about the DT- or have significant augments on it, that might sway you more toward Alabaster Earring.