Full Synergy Janeway offers full Shiled mitigation once you have taken hull damage once meaning all damage is going to shield. B'Elanna Torres is increasing piercing in all 3 stat categories. Janeway provides Isolytic cascade to damage and Isolytic Artifacts in play. Side officers to accompany janeway selected as others have potentially better uses below deck, but any Voyager Group officers will provide fully synergy values to Janeway.