I was on GEO/SAM wearing:
main="Caduceus",
sub="Genmei Shield",
range="Dunna",
head={ name="Merlinic Hood", augments={'Mag. Acc.+24 "Mag.Atk.Bns."+24','Magic burst mdg.+11%','INT+1','Mag. Acc.+8',}},
body={ name="Merlinic Jubbah", augments={'"Mag.Atk.Bns."+29','Magic burst mdg.+11%','INT+10',}},
hands={ name="Amalric Gages +1", augments={'MP+80','Mag. Acc.+20','"Mag.Atk.Bns."+20',}},
legs={ name="Merlinic Shalwar", augments={'"Mag.Atk.Bns."+26','Magic burst mdg.+11%','INT+10','Mag. Acc.+13',}},
feet={ name="Amalric Nails +1", augments={'MP+80','Mag. Acc.+20','"Mag.Atk.Bns."+20',}},
neck="Mizu. Kubikazari",
waist="Yamabuki-no-Obi",
left_ear="Gifted Earring",
right_ear="Etiolation Earring",
left_ring="Mujin Band",
right_ring="Shiva Ring +1",
back={ name="Nantosuelta's Cape", augments={'INT+20','Mag. Acc+20 /Mag. Dmg.+20','"Mag.Atk.Bns."+10',}},
I disabled gearswap, engaged the level 107 Eft so Gessho would provoke, disengaged, and made Impaction with Sekkanoki Brainshaker -> Shining Strike, which I MBed with Thunder V.