As soon as you acquire this weapon, equip it and adjust your attributes to scale with agility and luck to increase the chances of critical hits, buff your damage, and speed for more chances of playing Sciel's turn in combat. Since Sciel heavily relies on managing her skills to apply Foretell and Consume them, playing around skills will benefit in combat due to the extra effect of either buffing allies or debuffing enemies.,The weapon is even stronger when Sciel enters Twilight, since it will apply a greater buff and a greater debuff to both allies and enemies. Upgrade this weapon as well to Lvl 20 when you can to unlock the effect of gaining +3 AP whenever a debuff or buff is applied, which is once per turn. Since Sciel's skills are deadly because of how it can land multiple hits, you're going to need to maintain a considerable amount of AP to use those skills that require high AP.