Boundless Ambition: Just a swell Card, helps make sure your hand is always relevant and full of Cards to Discard for Rerolls.
Cannon Fodder, Feel Your Anger, Isolation, Rend, and The Best Defense...: Pretty cut and dry, control as needed. Heap as much Damage as you can on MagnaGuard with Cannon Fodder and The Best Defense... to avoid those problematic Die.
Tactical Mastery: Included one copy as more of for the Turn, using it to Roll out and then Claim the Battlefield or otherwise Resolve your Dice.
The Price of Failure: Only one copy included because in the end your only going to be able to pull this off once, and there is no need choking your Deck with a truly useless second copy of it. Thanks to Boundless Ambition, you should have a fairly easy run of getting it into your hand when you need and not before.