Not my work. But this is probably going to be extremely useful for someone!

https://gamefaqs.gamespot.com/ds/934598-puzzle-quest-challenge-of-the-warlords/faqs

Please note 2 things:

1. A lot of the links I have seen so far do not work. Especially ones hosted on the Infinite Interactive website, which does not appear to be fully functional anymore.
2. This guide does not feature any information related to the Revenge of the Plague Lord DLC.