In Rule 2.6 (Experience), replace “When a Skirmish ends, the Experience of participating Soldiers shall increase by the number of Enemy Combatants involved who became Dead during the Skirmish.” with:-

Within 72 hours of a Skirmish ending, and only once, any Soldier who participated in that Skirmish may increase their XP by the initial Health of each Enemy Combatant they dealt damage to during the Skirmish.

Reproposal of this, but with 72 hours instead of 24. Note that the current rule is a magic-pixie auto-effect of “the Experience of participating Soldiers shall increase” - I’ve just gone through and given XP to everyone who didn’t claim it for themselves, from the last Skirmish. (Someone also set the Skirmish to “sticky + closed”, which made it invisible; I’ve changed it to “non-sticky + open”.)