Among the five options, A and B can be eliminated first because the Attribute increase is too small.
Option E can store Soul Energy, which seems quite good, but the problem is what if the Soul Energy acquired next exceeds the storage limit? Wouldn't that still be a loss?
Both options C and D are quite good; one enhances the Soul Refinement from the foundation, further strengthening the Soul Strength, while the other can combine the soul and the Killing Intent series Skills to achieve a stronger Effect.
Both Effects are quite good for Ye Mingqiu, but there are still differences in value.
For Ye Mingqiu, enhancing the foundational Passive is the most important, while Active Skills cannot be compared. Refining the soul can enhance the Soul Strength from the foundation, whereas the Soul Killing Intent requires using Killing Intent Fluctuation to activate, thereby exerting an Effect targeting the soul.
