Biab is Great for practicing your soloing, especially over a 12 bar blues.
You can also use it for working on your comping skills.

Assuming you know some major and minor pentatonic forms on the guitar
Play a blues at 60bpm in A around the 5th fret
Play some solos. Think about what you are trying to say. not just run notes
Skip strings. skip note, vary your phrases.
Play some notes that are "outside" your pentatonic boxes.
Then change key to D.
Play some different solos around the 5ht fret also. Its a little different pentatonic boxes
Play all the other keys
Change the tempo till you feel slightly out of control
Change the style.

That will take about 5 hours.

Now learn 3 or 4 different shapes for each of the 3 chords and learn to comp the changes using these shapes.
See if you can easily switch shapes within a bar.
Sometimes I will mute the chording instruments (guitar,keyboard)in the biab arrangement to make sure my comping is rounding out the full band sound.

That will take a few hours more.

Move your pentatonic "boxes" around based on your newly practiced chord shapes.
Over time try to link the boxes together.



If you're thinking about jazz here's a study that has helped me on the guitar.
I call it the forced arpeggio study.

Start with a simple 3 chord blues using 7th chords.
At 60 bpm in the key of c practice your arpeggios (1,3,5,b7) over each of the 3 chords as the changes roll
At first play nothing but the 4 note arpeggio in quarter notes.
Then do it in eight notes. then do it in two octave.
Then speed it up a little.
No need to get too fast, there's other stuff to do.
Instead of playing 1,3,5,b7 try starting on the 3rd, then the 5th, then the b7
Try mixing it a little (3,b7,1,5)

Next substitute some chords in the changes. Add some minor chords or diminshed chords.
There are plenty of examples of exceedingly more complex blues changes in Biab.
Perhaps you have the BlueJAMC or BlueJamF folder under bb. Plenty to work from there.

Start slowly, no more than 2 chords per bar.
Play as slow as you need to tempo to keep up with changes.
Learn the arpeggios for the chords you substitute.

Now, learn different places to play these arpeggios.

That will take a couple of years.

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