Howzit
I passed the atpl exams last June.
I found Avex is okay for most of the knowledge you need. Especially the exercise chapters (with worked answers) for instruments and nav gen. Notes are old though and don't provide some of the stuff you need to know for ATG...
FTC covers a lot of the ATG stuff in their typical exam quesions which are excellent.
Don't know about Aeronav although one of my mates passed 4/4 using just these.
I can provide you with at least a dozen of the questions I remember for ATG... if you so wish !
Cheers
Chris2