shared experience question: ek, ed, rp, 2x monk

hello, i have question about shared exp. how it works if my party is: ek + ed + rp and 2x monks? is still 100%? bcs before we was hunting ek, ed, rp and monk and we did 6,5kk raw on ice lib and later we took our friend and we did similar exp with one more monk but we just killed more monster which is fine. How shared exp is counted in this case? is 100% or 80?