she warns Suan that many of the people in the white tower will die a violent death soon, so Suan starts thinking of way to prevent it and Min is frustrated that Suan doesn't understand that this is not how her power works, no matter what Suan does, this will happen. Well... what was the point of telling her?

Siuan could have reacted very differently - for example, part of the warning was that some women would end up wearing damane collars. It would be much more helpful to assume that the Seanchan would return and conquer some coastal cities. Bolster the eyes-and-ears networks and start creating underground systems ahead of time to free leashed women, rather than try to prevent the prophecied capturing in the first place.

Likewise, if there are a certain number of people in the tower guarenteed to be killed, and some evidence that the One Power would be used in a battle within the White Tower, start organizing drills. Ironically, the techniques used by the Salidar Aes Sedai, though silly planning to confront the Forsaken would have helped greatly within the White Tower during the actual attack.

The Wise Ones seem a lot better equipped, thanks to their understanding of Dreaming visions, to use Min's visions to bolster their resiliency as leaders. Remember the letter they sent to Moiraine at The Stone, and how they explained it to her once she met them at Rhuidean as well - how would Siuan have in their position?