For effective Hardcore farming on AFK, a pyromaniac is needed. It is recommended to choose the INSANE difficulty to get 252 crystals per hour. For the macro to work correctly, you need to: 1) select a place to install the pyromaniac, 2) adjust the cursor under the wave skip button, 3) run the macro. Important: do not start the wave before the macro is started. Start it on the «Ready?» button or after defeat.