Cube: Bastion. Your DPS units take priority over her, if no empty slots, can use resilience.
OL Gear: Not recommended to OL, but you can use max ammo capacity, elemental damage and ATK. Crit and hit rate is provided on her kit, so not necessary but good filler stats.
Sadly, increased pellets doesn't increase damage, making shotgun compositions quite limited. Versatile buffer for crit teams and people lacking other burst 2 buffer / supporter units.
