I hope this is the right place for this question...

As a non-magic using character I wanted to try burning creatures via throwing naphtha vials and striking them with a torch. Could not get this to work and after reading somewhere on elanthipedia about using a flaming branch or log to strike an opponent after successfully coating them with a thrown vial or bottle of naphtha I tried this as well to no avail.
Wanted to know if there is something im missing, if this some type of easter egg, or if this was removed entirely for non war mages. Any info would be appreciated, thanks.

One thing that's changed is that when you hit a target with naphtha, it coats a particular body part. The messaging should reflect which. In order to ignite it, you'll need to hit the same body part with your flame.

If that's not working, then it might be an issue with the new branches and logs.