Your Charged status expires next turn whether you use it or not. That happened in previous battles where you charged up but had nothing to target with your Electric attacks, hence the boosted status went to waste. Since you use Charge in Round 2, best to take advantage of your Electric power while it's doubled. I'd prefer Sharps take Beldum down while you go after Aron or Heracross. Aron has 30 HP left and quite possibly could fall or come close to falling from your Spark Attack since it's Defense has been lowered. This would free up Nah to Attack Beldum with Dragon Rage or merely move up north to prepare for Numel. Your Jetpack gives you flexibility in who you can attack so whomever you decide to strike should be with that in mind.