Braided stainless is for the parts that flexx at the suspension joints. You really want proper hard lines for the parts that go along the body, which will be bent steel,
Also, if the corrosion wa bad enough to eat through the brake lines, you want to check the frame steel as well.
2012 Focus Titanium Hatchback
121,000 km, all stock
1990 Toyota Supra turbo
I think the cams are still stock...