I found a good strategy if you want to gain time: Snorlax is great because of it´s HP, so it can take attacks while you power-up your benched pokémon! Though his retreat cost is high. So you need retreat with Switch trainer card... Or use Doduo lv10, that does have less HP, but it doesn´t need any energy to retreat! I have few Switch trainer cards, so Doduo is pretty good for me!