I really like that "puppeteer" idea, It would definitely make a more interesting creature.
- So because of spiders (arachnids) having eight legs, should the spiders be tiny? living inside the shells of the presumed insect or arthropod parasites, using web like a rigging system to move the dead host around? if so, what would make it anomalous?
- what if it did the puppeteering to all creatures; hollowing them out and using the "shell" until it decomposed or fell apart?, including humans? could this mean that many spiders could work together to control the larger animals?