I did a standard 301 redirect for a domain, but the original domain has about 300 pages that have some strength.

It doesn't make sense to make them all point back to the new home page because the individual pages are about some topics.

Also, there aren't the same pages in the new domain, so where should the original random pages redirect to? I would like to have them rank for the same topics they used to, but without having the original domain giving them strength, they will just stop ranking and die off.

What should I do?

Thanks, Alex