Collection products deliver a range of packs, typically from the current era of Pokmon sets and, while it may not be the best way to get chase cards from expansions, it's definitely a nice way to open plenty of packs at one time
Different ones fit different decks, but Trinket Mage stands out for its ability to get cheap, powerful artifacts
On paper, this deck is unstoppable, but it's still very predictable and your opponent will do everything in his power to prevent you from evolving your Gardevoir
For example, Spirited Compainion, Inspiring Overseer, Bloodthirsty Adversary, and Bloodtithe Harvester all have solid ETB effects that opponents might be happy to get a second time
Ill use Beta as the baseline, swapping Alpha when my brain is almost sure the card came from that release
Finally: combining knowledge and feeling Ultimately, it's all about experience