If you increase airspeed by adding power, and maintain the same attitude you will get high on glidepath as per the lift formula. You would need to move your aim point higher up the wind screen.
people teach ILS's by using pith for path
Who does this? By the time people are flying an ILS, they should have a grasp on the equilibrium of forces acting on an aircraft and not need these made-up little rules of thumb. At this stage it would be better to teach 'power and pitch control airspeed and glidepath'.