Is it worth applying with AAB

To be honest, it depends on the entry requirements of that course and what university it is.

If your predicted grades are similar to that of the university requirements, then I suggest it's safe enough to put it down as a choice.
When I was doing my UCAS application, I put down one or two universities which had requirements that were one grade above my predicted, grades, two which matched my entry requirements and one or two that were below my entry requirements.

That way, you have a variety of options and this kind of provides you with a safety net.

Hope this helps and good luck with your application

Where were your offers from the ones higher than your predicted grades.
I am looking at Durham and St Andrews

Am I wasting my time applying with AAB for computer science? Not eligible for contextual offer