i can't seem to get anything more at lvl 4 experimentation... i've got 1/3 for the research task, and i've done the experimentation about 10 times now without increasing it. I just don't get why it's different from the other professions that have XP for each operation, instead of all at the end. I guess i'm also frustrated…
I just want to get enough items at a time so that it's worth my time to make potions instead of buying them. So far I can't see a way to do it. Guess I'll just keep leveling it and see if it gets any better.