Get most of the custom Initiative sorting stuff through the door

module/documents/combat.mjs

@@ -6,6 +6,24 @@ Resources:
 */
 
 export class RipCryptCombat extends Combat {
+
+	get groups() {
+		let groups = new Map();
+
+		for (const combatant of this.combatants) {
+			const groupKey = combatant.groupKey;
+			if (!groupKey) { continue };
+
+			if (groups.has(groupKey)) {
+				groups.get(groupKey).push(combatant);
+			} else {
+				groups.set(groupKey, [combatant]);
+			};
+		};
+
+		return groups;
+	};
+
 	/**
 	 * @override
 	 * Sorts combatants for the combat tracker in the following way:
@@ -14,13 +32,14 @@ export class RipCryptCombat extends Combat {
 	 */
 	_sortCombatants(a, b) {
 		// The distance from fate
+		return super._sortCombatants(a, b) * -1;
 	};
 
-	nextTurn() {
-		// Make it skip all combatants with the same initiative value
-	};
+	// nextTurn() {
+	// 	// Make it skip all combatants with the same initiative value
+	// };
 
-	previousTurn() {
-		// Go back a step
-	};
+	// previousTurn() {
+	// 	// Go back a step
+	// };
 };

module/documents/combatant.mjs

@@ -0,0 +1,37 @@
+import { distanceBetweenFates } from "../utils/distanceBetweenFates.mjs";
+
+export class RipCryptCombatant extends Combatant {
+
+	async _preCreate(data, options, user) {
+		const allowed = await super._preCreate(data, options, user);
+		if (allowed === false) { return false };
+
+		const start = game.settings.get(`ripcrypt`, `currentFate`);
+		const end = this.actor?.system?.fate || this.baseActor?.system?.fate;
+		const fateDistance = distanceBetweenFates(start, end);
+
+		this.updateSource({
+			initiative: fateDistance,
+		});
+	};
+
+	get groupKey() {
+		const path = this.token?.actor?.system?.fate;
+
+		// Disallow grouping things that don't have a fate path
+		if (!path) { return null };
+
+		// Token Disposition (group into: friendlies, unknown, hostiles)
+		let disposition = `unknown`;
+		switch (this.token.disposition) {
+			case CONST.TOKEN_DISPOSITIONS.HOSTILE:
+				disposition = `hostile`;
+				break;
+			case CONST.TOKEN_DISPOSITIONS.FRIENDLY:
+				disposition = `friendly`;
+				break;
+		};
+
+		return `${path}:${disposition}`;
+	};
+};