Put Tyra Karn in the HELM. The helm and tower system needs to become more efficient; at the very least I should be able to decrypt both umbral and prime engrams in the helm. How? As far as I am concerned, Tyra Karn has been out of the job ever since the farm was foreclosed by the last city bank and could use a place to stay. By adding her to the HELM we give it even more functionality and create a more efficient design. The tower would still have tons of purpose as one of the main social spaces and the hub for collecting bounties and quests, so I do not see any reason to not make this change!