A-Tier Longtusk Stalker: Energy 100% Faceless Agent: (basically any tribal-themed pack) Freyalise, Skyshroud Partisan: Freyalise 100% Blade Splicer: Many Faces 100% Restoration Angel: Flickering 100% Hardened Scales: Scaled Up 100% Master of the Pearl Trident: Merfolk 25% Svyelun of Sea and Sky: Merfolk 100% Nettlecyst: In the Machine 60% Thought Monitor: In the Machine 30% Priest of Fell Rites: Reanimated 100% Serra's Emissary: Serra's Realm 30% Sanctum Weaver: Enchanted 30% Sterling Grove: Enchanted 10% Sythis, Harvest's Hand: Enchanted 60% Thalia's Lieutenant: Humans 100% Yawgmoth, Thran Physician: Plague 100% As for the A-Tier cards, Enchantress is going to be the hardest deck to build since there is so much variance
Squad functions a little like kicker, letting you pay extra mana when you cast a creature spell to get token copies of it
Create a token that's a copy of one of those creatures, except its power is equal to the total power of those creatures, its toughness is equal to the total toughness of those creatures, and it's a colorless Eldrazi creature
SM8b GX Ultra Shiny was very popular
you should be picking them because you really want to play a hardcore Guardian, or Survivor, or whatever