Open LF inner bleeder, have second person gently / slowly bring pedal to the floor (without forcing it), close bleeder n slowly bring pedal back up, repeat until no air then do inner.
Move to RF and repeat.
Move to RR and repeat.
Move to LR and repeat (monitor fluid level as you go)
If pedal still poor, crack lines at the master cylinder and gently bring pedal down, hold n close both lines, repeat second time then try pedal.

Don't pump then open bleeders, as above only.