Death Stalkers: the hit-and-run formation (AoS 4th Ed)

A chosen unit can use charge and/or shoot abilities even after it has retreated in the same turn, and it ignores the damage some retreat rules would inflict. That lets you disengage from a bad combat and immediately re-enter one on better terms, or peel off to a fresh target.

Players who like tempo and repositioning within the combat phase, luring enemies out with chaff before swapping in a real threat, and who want to keep units alive by escaping unfavourable fights.

• Fast melee units that want to charge repeatedly (e.g. Bladegheist Revenants, Hexwraiths)
• The Black Coach as a mobile hammer that dislikes being pinned
• Cheap screens used as bait before the retreat-and-charge swing

Choose it when you expect messy, prolonged combats, when you want to bait and punish, or when your list leans on a few mobile hammers that must avoid getting stuck.