If I read it correctly, in one of his books (Shadow of the Avatar Trilogy), Elminster was asked on two occasions by Lord Ao to accept God-hood, after the original Mystra dies, and he turned it down.
Also, the first Mystra favored Elminster more than the latter, right? So I am betting that Elmisnter only has his age and experience backing him now, because this latter Mystra (Midnight), did not care too much for him as a teacher when she was still a mortal. I think Elminster does more on his own now, than he used to. And the attention from the Gods are equally shared through-out all the chosen. I just haven't se4n any recent proof that the latter Mystra is paying him more attention than anyone else. But that is just my perception. Feel free to disagree.
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Larry, a
Loyal Guardian of the OHF