Why not use Fake Out to hit Darkrai/Smeargle and then hit them with something strong enough to KO them.
252 HP / 80 SpA / 176 SpD, taken straight from the UU Tank in the analysis. It allows you to survive Omastar's Surf in the Rain after switching into Stealth Rock.
What is a good EV spread for a Modest Ampharos with this moveset:
-Thunder Wave
-Thunderbolt
-Signal Beam
-Reflect
252 HP / 80 SpA / 176 SpD, taken straight from the UU Tank in the analysis. It allows you to survive Omastar's Surf in the Rain after switching into Stealth Rock.