Razgriz-Specter
Member
Maybe add a 4th floor below the vault, with maybe one additional vault entranceThat'd be pretty hard to adjust into Siege. Maybe if it was like Dante's, it'd be a bit easier.
(a 3rd staircase possibly a fire-escape that connects to the helipad or maybe open up an elevator shaft that you can repel into the vault)
That in addition to having the old repel lines running down to windows on the new floor should work imo.