The northern window in Armory Lockers has a good angle of the Vehicle Customs (EXT) rooftop, another common area of attack. In the Armory, the exterior walls in the southwest corner of the site can be easily flanked via the Security Room (2F).
A runout of Offices (2F) window can help here, but be careful of Claymore placements. The exterior doorway into the Archives is a common area to try to plant the defuser so be aware of attackers pushing this spot if planted, it can be watched from a number of exterior areas making defense difficult. Attackers can get a view of objective through the southern 2F windows in Waiting Room (1F), so be careful not to stand or hide near the windows in Tellers. You can control the Tellers from the Offices (2F) above, which is also a common area of attack, so traps can easily catch enemies off guard up there.
Make sure to not entirely reinforce the Bathroom walls, because there is only one single entrance into the room which can be easily denied should the attackers plant the defuser in there.
