Is this a good Dragunity deck?

You can make a loop with "Dragunity Arma Leyvaten" and "Light and Darkness Dragon". When you summon "Dragunity Arma Leyvaten", equip "Light and Darkness Dragon" to it. Whenever it or "Light and Darkness Dragon" is destroyed, your field will be destroyed by the effect of "Light and Darkness Dragon". Then, use "Light and Darkness Dragon's" other effect to Special Summon "Leyvaten" from your graveyard, re-equip "Light and Darkness Dragon" to it and repeat. The only weakness in this loop is cards that can remove the two monsters from play, or send them back to the hand or deck.