I've been using Alchemist more now that its not locked behind rep points. The unstable concoctions are pretty cheap. Some people have suggested that the acid bomb is doing water damage not earth. I haven't checked the code to see if that's true. That may be why it seems to bypass earth resistance.
The combination of Alchemist and Attendant is interesting. I can see why that might work. Never taken the Attendant class myself, though the free action is attractive now that I think about it.