I have been looking for a detailed explanation for which mobs each "Eluder" ability works for, and couldn't find any. Each guild sells one and it seems to cover pretty much every mob category. Has somebody experience with those / can list the mobs each works for?

Here's a list of all of them (Guild it is bought from):

Ashkin Eluder (Weaver)
Beastkin Eluder (Miner)
Cloudkin Eluder (Carpenter)
Forgekin Eluder (Alchemist)
Scalekin Eluder (Leatherworker)
Seedkin Eluder (Botanist)
Soulkin Eluder (Blacksmith)
Spoken Eluder (Armorer)
Vilekin Eluder (Culinarian)
Voidsent Eluder (Goldsmith)
Wavekin Eluder (Fisher)