Try QRH P1.10.20 737-700/ CFM56-7B20 Flight With Unreliable Airspeed. (Sept 26 2003).
Final Approach (1500ft) Gear Down, %N1 for 3 Deg Glideslope.
Weight (1000 kg ) 80.0 70.0 60.0 50.0 40.0
Flaps 15 Pitch Att 4.0 4.0 3.5 3.5 3.5
(Vref 15 +10) % N1 57 54 51 46 42
This will help give you a reference to aim for.