Getting Zombie World out early is important, and having Field Barrier is a good way to protect it. Dragon's Mirror is useful for getting Dragonecro Nethersoul Dragon out and can be done whenever its drawn since Zombie World will make everything on the field a zombie. Royal Decree is helpful to defend against any traps that may prove to be annoying.
Aside from that, the monsters allow for a variety of different strategies to be utilized. Uni-Zombie and Gozuki are helpful for putting cards from the deck into the grave, which is a useful place to keep Doomking of Balerdoch and once per turn sending Glow-up Bloom to get access to a lvl 5 or higher monster. Endless Decay is useful early in the game, but once opponent is no longer at max hp, it can be a helpful material for tribute. Il Blud, Zombie Master, and both Red-eye zombie monsters are helpful for special summoning from either grave. Using the special summoning to get XYZ and Synchro monsters out is one tactic I tend to use.