stuka bomb fuse settings

[stugumby]

Hello, im making a mini campaign for a stuka pilot in july 1941 and am having some glitches regarding bomb performance. I have my settings to switch electric fuses on the joystick so my question is if diving from 3300m and pullout set at 900m what fuse setting, instant or long delay, and if load is ab250 or sc250 mixed with ab23 what is best overall setting?

If all ab bombs airburst setting of 4 sec etc??