Trent,
Not disagreeing with rates of descent or selecting landing flap etc .... rather, the only times I've ever flown a square base are when I'd used too large an AoB turning base, or had a strong headwind, or been too wide on downwind and not corrected it prior to turning base ....
Current teaching where I work now is to use constant bank all around base, particularly in poor vis (common in our part of the world).
VS.