Loot, Exuberant Explorer lets you play an extra land on your turn, helping to ramp you up to use their second ability
Your main strategy is to generate a lot of Ooze tokens with a lot of +1/+1 counters, so Doubling Season and cards with similar effects like Primal Vigor and Parallel Lives will make your deck that much more efficient by increasing the number of tokens, or counters, or even both
The Human Cleric Wizard doesn't enter prepared, but can become prepared repeatedly at the beginning of each end step (not just yours) if an opponent has more cards in hand than you
That means that this deck can quickly overwhelm opponents with the sheer number of zombies and also has a side-strat that revolves around sacrificing your creatures to get even more zombies on the board
I complete them a few days before the deadline, let them sit for a while, and review them over and over