Your quanta looks too tight.
The classic mono death rush used against AI3 uses 6 Poisons, 6 Mummies and 4 Dragons. All the rest are pillars, or if you can afford it 50% pillars and 50% Pendulums to have a bit of Earthquake resistance.
Either way, you can see a lot of decks used against AI3 in the tutorials and in the Community Recommended Decks Section