Wellll......
Gald, it's interesting that you mentioned it not being a good idea to have A/P off, A/T on- I agree entirely, but you might recall that this was ALSO a practice used at our erstwhile employer (in fact, BOTH our previous mutual employers!)
I took that with me to Blighty, and it almost bit me in the arse, demonstrating it to an F/O onto a short runway on a Greek Island, the supposed advantage being you could carry the minimum 5kt additive regardless of wind.
For reasons unknown, the A/T decided not to go into "retard" at the appropriate RAD ALT, instead INCREASING thrust to try and keep VAPP.
One of them "the time I probably should have gone-round but didn't" moments!!!!
My point being, the old automatics in the classic-slug can be a bit unpredictable, so I'm still a little wary of having them on in ANY mode near the ground.