With the plethora of different architecture, one must be able to quickly be comfortable infiltrating a complex in unknown territory. We have to practice maneouvering all types of terrain.
Be wary the stone that appears solid.
Also be watchful of security cameras everywhere. You must never leave a trace of your presense on your missions.
A single blood-stained rose will have the locations of where to meet. Ensure it is not your blood on the rose.
Brethren… can you not just use your elemental power over the element of stone, wood, metal or indeed void to bypass walls?
I find your practical application of physical solutions to physical problems puzzling.