Excellent table!
Could you add an explanation or description, as not everything is clear in it.
The first page is for standard monsters, and the second is for life artifacts.
For example, we have 100 imps. We look for the imp in the table, or a monster with 4 HP. Then, we look at the row and find the most advantageous number of imps. We find 97 and go up one row to DEMON and find the number 11. This means that from 97 imps, we will get 11 demons.
Then, we look at the lower table. To get 11 demons, we need 8 Pit Lords. That's all there is to it :-)