CR 1: mane
CR 2: abyssal maw, abyssal skulker, dretch, nashrou, quasit
CR 3: abyssal ravager, maurezhi (5-6 HD), rutterkin
CR 4: abyssal evicerator, ekolid, guecubu, maurezh (7-8 HD), skulvyn
CR 5: bar-lgura, jovoc, maurezhi (9-10 HD), juvenile nabassu, skurchur, water demon
CR 6: artaaglith, babau, broodswarm, maurezhi (11-12 HD), uridezu
CR 7: armanite, arrow demon, succubus, maurezhi (14-14 HD), zovvur
CR 8: dybbuk, palrethee, maurezhi (15-16 HD), shadow demon, yochol
CR 9: abyssal drake, bulezu, vrock, maurezhi (17-18 HD)
CR 10: alkilith, bebilith, cerebrilith, chasme, maurezhi (19-20 HD)
CR 11: hezrou, retriever, wastrilith
CR 12: ghour, lilitu
CR 13: glabrezu, jarilith
CR 14: blood fiend, kelvezu, nalfeshnee
CR 15: nabassu, sibriex
CR 16: goristro
CR 17: klurichir, marilith, sorrowsworn
CR 18: deathdrinker, myrmyxicus
CR 19: molydeus
CR 20; balor
that covers crs of creatures in book and other resources.