|This build will utilize and build upon Loki's Gravity Ploy Weapon. Panic Ploy 3 has good synergy with her weapon to combo both Gravity and Panic Ploy for putting foes at a disadvantage.
A Slot: You can keep '"`UNIQ--item-316--QINU`"' equipped for +5 HP to help her ploy skills. Boost HP for ploy effectiveness anyway you can though, otherwise boost Attack for maximizing her offense. Real Simple.
B Slot: '"`UNIQ--item-319--QINU`"' is the obvious best choice for Loki for her staff but this skill is hard to obtain. '"`UNIQ--item-322--QINU`"' is good to ensure her HP stays high to activate her Ploy abilities. If you want something else, '"`UNIQ--item-325--QINU`"' can be helpful in general for support.
C Slot: '"`UNIQ--item-328--QINU`"' can be used in general due its usefulness for +6 Atk buff. You can also give her '"`UNIQ--item-331--QINU`"' here to combo with Gravity Ploy from Loki's weapon.
SSeal: These are flexible due to having both Panic Ploy and Live to Serve being available as a Sacred Seal to free up the B and C slot for other combinations.