You'll need to evolve a Ralts to Gardevoir ex in order to start attacking, though, so you'll want to go first in order to get swinging as early as possible. Drifloon's Balloon Blast attack deals ...

While Gardevoir allows you to attach Energy to Cresselia ex quickly, it takes a few turns to fully evolve Ralts, by which time Darkrai ex can also be ready to go. Worse, the most common Magnezone ...