All main story beasts will drop LB points and some seem to drop tokens too. Given the toxic spirit is only a few hits, try it and see! Let us know and then I can add it to POST 13 of the monster hunt guide.
This is what is currently there:
These monsters available during normal game play also drop silver tokens during Monster Hunts.
* Aquanther | spawn from mermaid related items
* Marmosea | spawn from cursed reefs mainly, prison
* Skunkupines
* Fangbeasts
* Dire boars
* Glimmer Golems
* Wisps | spawn from cloudberry and grand rooted Lillium