What is the best choice for a necron HQ?

The best choice for a Necron HQ often depends on your playstyle and army composition, but the Overlord is frequently regarded as a top pick due to his versatility and ability to boost nearby units with powerful command abilities. He can be equipped with a variety of wargear options, including the Relic "Veil of Darkness" for mobility. Alternatively, the Cryptek is valuable for providing support with healing and buffs, making him a solid choice in more defensive or synergistic lists. Ultimately, the choice should align with your strategic goals and the specific synergies you want to exploit in your army.