Complex sentence: At the time of the "One Life to Live" finale episode, all of Viki's six alternate personalities are integrated with her baseline psyche, though at times she has been forced to impersonate one of them, particularly Niki and Jean.
Split into simpler sentences: At the time of the "One Life to Live" finale episode, all of Viki's six alternate personalities are integrated with her baseline psyche. At times during the series, she is forced to impersonate one of them, particularly Niki and Jean.