B757 Power Settings
I am assuming we are talking abut RB211-E4.
By using assumed temp for T/O the EPR varies with weight, temp, flap setting and so forth.
During approach the rule of thumb for standard ILS works well for me:
Flap 30 - EPR 1.20
Flap 25 - EPR 1.18
Steep turns 45° bank, clean, speed 250: Add about 0.05 EPR and keep the pitch at 5°.