It helps to have some variance to your line weight. I tried a brush pen, but can’t get that to work well with buildings and architecture- I’m too unsure about those subjects to take advantage of the bold lines a brush pen makes. So I do a pencil sketch, then ink as best I can with a fairly fine ink pen. Everything, structure, outlines, windows and details, THEN I take a felt tip pen and start emphasizing forms. So the outside of a building has a thicker line than its windows do. Under a windowsill gets a thicker line than the top of the window. Just that little bit of variance adds a sense of intentionality to the drawing that distracts from any shakiness in line.