Geo Ergon Weapon Fight

Lehbrailg +2,Elder's Grip, Witchstone, Hagondes Hat +1, Hagondes Coat +1, Hagondes Cuffs +1, Hagondes Pants +1, Umbani Boots, Eddy necklace, Witch Sash, Friomisi earring, Hecate's Earring, Strendu Ring, Galdr Ring, Toro Cape
I have tried this fight numerous times and not doing near the damage on average as Sumy does In his video. Using opposite elements of luopans the best I got this guy to is 21% so not sure what I am doing wrong but I would like to know the nuke gear sets I average 400 ish on t1's where Sumy hits low 600's I am about to give up with this fight.
Looking for suggestions Is it all MACC or MAB

I used a Vanabulum (AATT Staff), Zuuxowu Grip, Dosis Tahlum (when I don't need Dunna), 5/5 Hagondes+1, the head has Magic Attack Bonus +26, all the others are 13-14 though (cant log in during maintenance to check), so nothing major. Friomisi/Hecates ears, Strendu/Acumen rings, Toro Cape and Penitents Rope. I did eat a C. Snow Cone in the video though which adds a little Magic Attack Bonus.

what augments do your hagondes pieces have, also seidr cotehardie is a godsend for this fight