Need help w/ the Final Battle w/ Zinaida

[J.E_Magog]

Never played the portable version but If you can dual wield machineguns/ handguns with wide and shallow FCS that's usually enough to defeat most enemies in the game.

For an EO core build you can try CR-C98E2 + Dual NIX machineguns

For a hanger core build, equip Two Sylph machineguns and two CR-wh01hp(revolver) handguns for your hanger units.