What are the key strategies and card choices in a competitive Yata Lock Deck for the 2017 format?

In a competitive Yata Lock Deck for the 2017 format, key strategies include using cards like Sangan, Witch of the Black Forest, and Mystic Tomato to search for Yata-Garasu and Chaos Emperor Dragon - Envoy of the End. Other important card choices include cards that can disrupt your opponent's plays, such as Trap Dustshoot and Mind Crush. Additionally, cards like Dimension Fusion and Return from the Different Dimension can help you bring back banished monsters for powerful combos.