haven't really played much Ubers this gen, but I'm curious - since the only Hera justification over Terra/Genesect is the Darkrai countering, would Sleep Talk/Megahorn/Close Combat with no 4th move be worth considering, to guarantee Sleep Talk picks STAB? i don't think I'd want to be locked in on a non-STAB Stone Edge/Night Slash anyway.
use Meloetta. trust me. she's awesome.
Pokemon Showdown records:
OU - 1733 / 79% / 1839(71) / 45-16-0