I was just wandering around Malacca hunting for Pokmon cards when I popped into FamilyMart
I will quickly state that the number order for any of these cards have little meaning
Dracossack required two level-7 monsters (precisely the level of the dragons) and could destroy cards on the field whenever it wanted at the same time that it protected itself from destruction
You can run keyword-based monitoring or target specific product URLs depending on how much advance notice you have on a drop
I came up in an era where the archetype was led by either Cromat, simply because you wanted to be in five-color, Sliver Overlord, because you were a slivers player, or Child of Alara, because you wanted to make a statement
You can also attempt to limit dredges card draws, but this is a lot harder to do outside of Narset, Parter of Veils and the like