Insert page to multiple locations

Hi, I have one big pdf with few thousand pages and another with one page, can I merge those the way that result pdf has every odd page from first pdf and every even page from the second pdf's first page?

For example I have few ideas but as im new to Quick PDF, I dont know are those applicable:
1. Insert second pdf page to first pdf after 1. page, then after 3. page etc. (is there on disk function to do this)
2. Append second pdf page multiple times to first pdf, then move those pages to correct locations aka after 1. page, after 3. page etc.
3. Extract all pages, multiply second pdf-s page to match first pdf page count, rename files according correct placement, batch merge them all.

Memory usage and speed is important as first pdf is very big, possibly should be done using on disk functions.
What is the best way to accomplish this?