About Kushy (I've decided not to pull)

To pull or not to pull Kushy... My conclusion for now is... I won't pull. The shield buff from Kushy references Kushy's own attack power, requiring investment in Kushy's constellations and equipment, which is costly. Despite needing to raise attack power, Kushy's own damage output is low (How much resource can be allocated to a character with low damage potential?). Debuff removal is unreliable, so a separate cleanser is needed. And, the drain resistance, which seems like a highlight, might not actually be that strong? (Defense relies on shields or multiple barriers, so wouldn't it be better to add more attackers or buff existing attackers?) It might be strong against冥パ (Mei-pa) teams, though. For the team composition: Siv, Commander Cordi, Blue Fear, and one more attacker. Candidates include an attacker (Florence, Blue Primavera, Blue Merlin), Evelyn, and Kushy. Would adding Evelyn or another attacker be better... The overall shield is appealing, but the high cost is a drawback.