You get a lot more five drop for your buck than you do with four drops
A 1-Yuan box is the cheapest, it will have the most packs - usually 36, but each pack will have less rare cards, the entire box may not even contain the most rare cards at all
The deck can use multiple Pokmon and tactics, such as DragoniteV to suddenly defeat the opponent, Cramorant and Sableye to cut down the opponent with little wear and tear, and Kyogre's Aqua Storm to take out two or three Pokmon at once
While Pokemon have been featured in gorgeous pieces of cardboard, a lot of value is also found in Pokemon Trainer cards, specifically Supporter Trainer cards
Theres also a really nifty combo involving [c]Wheel of Fortune[/c] and [c]Narset, Parter of Veils[/c]