EX Sandstorm introduces a a number of ways to broaden your options mid-game. Many Pokémon have attacks that will let you search your deck for copies of themselves, or other Pokémon, or evolution cards, allowing you to avoid a quick loss because your last Pokémon was Knocked Out; or to get key Pokémon into play quickly and efficiently. However, these attacks have a subtle edge to them. You may want to include single copies of several different versions of the same Pokémon, then use the 'call for friends' style of attacks to find the version whose attacks best suit your current needs. Also useful are the Trainers that have similar effects, like Lannette's Net Search (87/100) and the long awaited Rare Candy (88/100). Adapting to your opponent's strategy through selective Pokémon use can get you out of almost any tough situation.
Choices, choices, choices. Pokémon-e TCG: EX Sandstorm is all about making choices in deck construction and gameplay. Don't be daunted by them, though: the only way to master your strategy is to dive right into the Sandstorm!