Theres plenty of cards in the base set that are still strongly used in competitive, tournament play too including cards such as Specialized Sound Waves, Staff Strike, Meteor Shower, Frigid Heatwave and Hardened Jab
Sidequest: Play Blitzball seems quite good, giving a nice power boost upfront and eventually transforming into quite a powerful equipment, World Champion, Celestial Weapon
Fortunately, Giada also has excellent aggressive stats , being a 2/2 for 2 with Flying and Vigilance, relevant abilities that can enable Giada to push damage in the air for large portions of the game even without additional Angel support
For example, you can only find Pikachu ex in the Pikachu booster pack
Personally, Ive gone for Gamegenics for most games, but buying Dragon Shields for games that uses that size and that deserve it.