You could make Xichunmael use 5 AOE skils in a single turn without even double slotting
>Xichun ENTERs, using her S3 and S-1 (2)
>Lord Lu orders Yi Sang to use his S3, Yi Sang makes Xichun use her S3 (3)
>Yi Sang uses his regular S3, makes Xichun use her S3 (4)
>Xichun uses her regular S3 (5)

Potential status?