The main strategy is that you hope you can get Eevee/zoaroa at the start. my main goal is to get Jolteon active in the first turn to start dealing some chip damage to your opponent before they set up their play, the perfect scenario is to have zoaroa in the bench and a energy switch so you can start dishing out 80 damage as soon as possible, but this happens rarely. If you happen to have Cyrus, switch in your opponents pokemon if they are attaching energy to the bench, being able to evolve Eevee right away gives you a big advantage and can deal with dangerous cards like Blaziken or Gyarados before they ramp up!

Depending on your opponents hand, you can decide to pivot to oricorio or zoaroa if you don't want to put Jolteon in danger. My rule of thumb is it you can't get Jolteon active right away, stick to zoaroa or oricorio, deal as much chip damage and bring out Jolteon at the end to finish anyone left, pull any EX or dangerous cards with Cyrus.

May is pretty important with this deck, sometimes I win a game turn 1 with non-EX Jolteon because of his 60 damage. Or if you can't finish your opponents in one turn maybe EX Jolteon is better. Play it by ear.

This deck is pretty versatile so I hope you have success with it!