I've just had a quick play through, and I am wondering if you are putting to much emphasis on holding at the ridge?
You are massively out numbered, and outgunned, and have way to few forces to hold at the ridge.
I think once the bridges are blown, maybe you should pull back right away, and keep moving from cover to cover, towards the exit points?
Try to occupy the objectives for a short while, but never long enough to become surrounded.
This is always my biggest mistake when defending, and exactly what I did in the play though I just had, where I held to long, got surrounded, and wiped out lol
Well it wasn't a complete disaster as I got a marginal victory in the end, but it was hit and miss.
I think if I try again, I will keep my Bn together, and keep pulling back towards the exits, and defend there.
That after all is the Axis main objective, to exit to Tempe, so you need to stop them from doing that, and the only way to do that is to stop them getting to the exit roads before you.
If you defend for to long at Castle ridge, once they do get past you, you will never be able to catch them up again, as they are much faster, being a mechanized force.
This is another one of them delay scenarios, and without the delay command working very well, its a tough one to beat.
I must say I am very much enjoying your attempts though, and its very inspiring to have a go myself.
Once again, this is not a scenario I would have chosen for an AAR, as I don't like to be on the defensive, but you have inspired me to have a go