Hello aspirant,
Having a waiting list rank of 24 in the General category for B.Arch at AMU puts you in a good position for potential selection in the second firm list.
To increase your chances you can go through the following :

Stay Updated: Continuously check the AMU website for updates regarding the second firm list.
Prepare Documents: Have all required documents ready in case you're offered admission.
Explore Other Options: While waiting for the second list, consider exploring other architecture colleges as a backup plan.

While there's a good possibility of getting selected in the second list, it's essential to maintain realistic expectations and be prepared for different scenarios.

I hope this information helps you.