Sergeant M. Fudgey said:
A) I'm not saying the Necrons won't get around to it, but if they were going to go after the Tau, soon, they would have started moving towards them, they still have a few of their (I forgot the name) Motherships, after all.
B) Fair enough, although when the Tyranids DO reach Tau space the Tau will have grown more, and the Tau fleets should be able to repel the Hive Fleet, even if a some of the Tau planets are destroyed.
C) Fair enough, but the Tau weren't CREATED by Eldar, in essence, the Ethereals were, that's only one Caste. Also, as far as I recall, there is only one Aun'va, and there will only ever be one, though when he DOES die there will be another head Ethereal. Also, perhaps those Eldar weren't in close contact with other Craftworlds? There are quite a few isolated Craftworlds who would try something like that, and I doubt that a stronger (or more well known) Craftworld (like Biel Tan, for example, emphasis on example) would attempt something like that.