To those of you who have the mental capacity to use the Gibbed save editor please do read on (I encourage you), if you do not then I am assuming I speak for both of us when I say that if you post 'my brain cells will commit suicide one by one' so perhaps it's best you leave.

Now assuming those of you who are left have a higher intelligence level I will explain how to get Unlimited B/A

Basically in order to do it you have to create a Siren of whom is level 1000, upgrade the entire skill tree and just load the save. Once you've done this the challenge "Heal plz" will continuously occur. Allowing for a continuous B/A rank up.

I've only tested this once so do let me know if this fails upon performance.. P.s I made this post out of sheer boredom and nothing else.