Thanks for the responses, y'all. There's some useful stuff here!

I think I'll give Chinchilla + Gathermate a try. Also, I was thinking before bed last night that leveling another toon as an herbalist/alchemist would be a bit annoying, but not the worst thing that could happen. That'd give me a third transmuter, and herbs skill up pretty fast. I'm going to go with the addon solution first though.