Minecraft wiki entry for Multiplayer_PvP_bases, associated text: Look at everything you can see from the outside. If the defenses are similar to yours, then think about weak spots you have (or had) in the defenses. Also, take note of the biome and defenses to figure out what gear to bring along. Then think of a rough draft of the attack plan. Will you drop down from the nearby higher terrain to glide in with elytra? Or will you use Potion of Invisibility and Depth Strider III to knock a hole in their underwater glass wall? Get creative with your plan!