Having to defeat champions with stasis abilities for the Vanguard umbral duties is stupid for a couple reasons: (1) Stasis is hardly strong enough to actually count as a kill. (2) The jerks you’re with in Strike fireteams steal all your kills even when you message them telling them what you’re trying to do. Suggestion for improvement: damaging a champion with stasis at least once should count towards a kill just as the same is done when you damage a major/boss once and it counts towards the kill. Otherwise, I and others I know just delete the quest as the stress of doing something so simple is not worth it.