Brake Actuator Air / Brake Bleeding

Hello,

I have an issue I need some help with from someone with experience bleeding the prius brakes. I have just spent over a year rebuilding a salvage prius that was in an accident. Although I have been reading the posts in this forum for a long time, I have just now joined because I need help.

I purchased Autoenginuity software and have bled the brakes >5 times now. I am confident it was done properly per the Toyota manual. The car runs fine, but seems to activate the ABS showing the slip indicator right when I am about to come to a complete stop, and then eventually throws the code for a malfunctioning Right Front Wheel Speed Sensor. I have replaced the sensor and am certain that it is not causing the issue.

Here are my guesses to the potential causes:
1) Air has entered into the brake actuator and is not bleeding out
2) Autoenginuity is not activating the proper solenoids for bleeding

When I spoke to a dealer tech about the bleeding procedure he had mentioned that they do it by lifting the car in a slope/angle. I do not remember the direction of the slope that he had mentioned. Is there a trick to bleeding air from the actuator?

Any help would be greatly appeciated, but please do not respond to this post telling me to go to the dealer as I am not going to do that.

Thank you