This deck can quickly brings out high leveled monsters and also offers great draw power to keep up your swarm tactics. With balance your starting hand would always be 3 monsters and 1 spell card. This is good because both spells in this deck need monsters in your hand to be activated.
Drawing cards will help you thin your deck faster so you can get the cards you need.
Moray of Greed is a possible spell card you draw at the start of the duel, and with balance giving you 3 monsters you can use it immediately. Return 2 water monsters from your hand to deck to draw 3 cards.