Chaos Preparation is about getting Diablo spawned as quickly as possible inside a full game. Diablo is an integral part of the META for leveling to 99. Along with Nihlathak and Baal, Diablo is one of the only significant sources of Experience at Level 98. Completed builds in the Chaos Preparation Tier List are ranked in accordance with their average efficiency of solo-executing the Seal Bosses with a full party in the game, ideally before all the Waves on a Baal-Run are cleared. Every Character Class is represented by at least one build.