> Can they be done with just Huda?
In the past, being able to recite Huda backwards was enough. The last 2 years or so, the level of deductive questions has increased. Also, the number of people failing physics has increased this year. So giving it a bit more depth is probably a good idea.
The other popular book is the 'Bushberg', it is a bit more of a text, not as short of a review as the Huda.
An area probably worth studying in a bit more depth is MRI. I believe the name of the book was 'MRI principles' by Mitchell.