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It is what it is, make the deck around it if you want
If you are lucky enough to open a textured foil, you just pulled one of the most valuable cards, and even the base version has a decent price if you don't get the fancy art treatment in your pack
Typically, double strike is best when it allows your creatures to hit first, hit twice as hard, and survive combat while making sure your opponent and their creatures dont
Since both cards are perfectly fine on their own, your best bet is to let them both do their specific jobs when the time comes
Archon's in turn been outclassed by Atraxa, Grand Unifier, but the two are often seen together in the same decks