[Halp!] Endless Tonics + Mystic Forge
I was trying to find an answer to this, for an “endless owl tonic”, and from what I could find. (which was nothing.) I assume no, you probably can’t convert the mystery tonics, they have what they have.
I myself roleplay as a Skritt from time to time. Nothing other than the Mystery Tonics that can be won via Black Lion Tickets or Artificer works. I’ve even tried the Mystery Tonics that have the same name, but turn you into trees and they don’t work either.
This is why I would love for the [Skritt Tonic] to be longer than 15 minutes. I think 1 hour is fair, considering the high cost of creating them via crafting.