Hello There
I have done a fair amount of lith printing, Agfa paper is one I find least responsive to my chemical mixes. Others you will find have been able to make this paper work.
My favorites in no paticular order----- Maco rf #2, Oriental #4, Sterling Lith, Ilford warmtone, Elite if you can find it is amazing. Ketona gives very warm tones and is quite interesting though I have heard through this forum that this paper has been recently changed or harder to get.
I was using Champion Nova Lith as a developer , with these papers and I know they work very well.
good luck and have fun