Tyrande isn't thinking logically

[Amadis-draka (Amadis)]

@Kaileena-the-scryers

The powers of the Moon Goddess far surpass that of the replacement Lich King. The true extent of Sylvanas’ and the Night Warriors power has yet to be shown.

Doesn’t have to be Tyrande alone:

@Deathisfinal-gnomeregan

I agree with the OP it’ll be Tyrande, but I think the NE wisps will have a part in killing her too. In any case killing Sylvanas will be the most single most important/memorable thing that anyone does.