Cyber Dragon Infinity is the main card to bring out during each duel since it can slow your opponent down by negating and destroying their activated effects and cards, letting other cards like Cyber End Dragon to OTK them.
Galaxy Soldier's effect can easily bring out Cyber Dragon Infinity if you have that card and at least 2 other light monsters.
The new card, Cyber Eternity Dragon, from the booster box set, White Dragon Abyss, is a really good defense card that protects your life points and your other cyber dragon fusion monsters.
The link monster, Cyber Dragon Sieger, helps your other cyber dragon monsters to empty your opponent's monster zones. It lets one machine monster you control gain 2100 ATK points.
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