The purpose of this post is to cover the basics of Necro swapping and general gearing. The basic premise is that you use a bunch of snapshotting mechanics in order to make your initial setup as strong as possible, before switching to a fully damage-focused equipment loadout (battle set). The battle set will be discussed in more detail in a different topic sometime later. There is a lot of gear you have to collect, and a lot of equipment that needs to be shuffled around, but the payoff is immense - super-endgame Dark Ritual sets give literally thousands more INT than vanilla Dark Rituals. You lock in huge multipliers to skills for long durations with a proper summon set as well - with Vallacre's basic attacks before 2nd awakening, and with Vallacre's Pledge skill-boosting after the reworks. Most of the information here is oriented towards endgame building and relatively high levels of play, so you don't need to immediately start towards this while leveling or even anticipate on using all of this advice in the future. None of this is needed for leveling, and if you want to focus on your utility instead, you can work with that. This is about optimizing damage in the late-game. Instead, try adding bits and pieces piecemeal, and see how far you can get comfortably using different equipment loadouts. Most of these aren't hard to do, and with some practice you can even finish setups very quickly.