Maniac
Apolyton Sage
Currently in GlobalDefines.xml you can set by how much the required Great People Points increase for the first couple great people. However as far as I know it isn't possible to edit what happens after you get IIRC nine GP and the GPP increase switches to 200 points per GP, and later to 300 GPP. Would it be possible to mod something so that you can set this too in GlobalDefines.xml?