I find the best response to the pitch phugoid to be--

When the airspeed is decreasing, or when the airspeed has plateaued at the peak airspeed and is about to decrease, move the stick forward. In short, move the stick opposite to the direction that the airspeed is changing, or is about to change. Try to freeze the airspeed, and then ease the stick aft a bit to ease the airspeed slowly back toward trim.

When the airspeed is decreasing and has dropped below the trim speed or the midpoint of the oscillation, relax your inputs, in anticipation of giving a new input as soon as the airspeed plateaus at the minimum airspeed.

When the airspeed is increasing, or when the airspeed has plateaued at the minimum airspeed and is about to increase, move the stick aft. Try to reduce the rate of increase in airspeed. In short, move the stick opposite to the direction that the airspeed is changing, or is about to change. Go easy on it so you don't invite a stall-- don't be so aggressive as to try to completely "freeze" the airspeed at this point in the oscillation. But don't be afraid to give a little aft pressure on the stick even when the airspeed is quite low-- the dynamics are such that gentle aft pressure at this point in the oscillation will have a helpful effect, and won't stall the wing.

When the airspeed is increasing and has risen above the trim speed or the midpoint of the oscillation, relax your inputs, in anticipation of giving a new input as soon as the airspeed plateaus at the maximum airspeed.

Recurring theme: "Move the stick opposite to the direction that the airspeed is changing, or is about to change."

Recurring theme: relax your input at the midpoint of the airspeed oscillation, or upon passing through trim speed, in anticipation of the next input.

Recurring theme: the peak airspeed is a good time to break the oscillation, by moving the stick forward as needed to freeze the airspeed-- to prevent a rapid decrease in airspeed-- and then easing the stick slowly aft to ease on down to trim speed.

S