You can just get Roc Tongues for gold by buying Honor Potion from Embersea and then turning them in for Academic Merit. Beats farming for it by a long shot. It's not even a glitch lmao just faulty planning on AQW's part
Sadly we can't do that for Doomatter or Necrot :^(
So to make courage tonic you really should ask for help, and then choose the Uruz Rune, and +HP or whatever the choice is.
Choosing the help button usually lets you get what you're looking for more frequently.