private IEnumerable <IGrouping <ArtifactTier, Artifact> > GroupArtifacts() => AllEntities.GroupBy(e => e.Tier).OrderBy(g => g.Key);
private IEnumerable <IGrouping <BonusType, Pet> > GroupPets() => AllEntities.GroupBy(p => p.BonusType).OrderBy(g => g.Key);
private IEnumerable <IGrouping <HelperType, Helper> > GroupHelpers() => AllEntities.GroupBy(h => h.HelperType);