Yeah, this is a pretty raw data from map file, and there are only 46 entries for his spawn point:
records/proxies/factionspawns/setpieceproxies/setpiece_nemesis_chthonian.dbr
tagUGVoidlands01A
C9BC619A5044635D3E3909A613EEBED3,316,320,488,a38,,C9BC619A5044635D3E3909A613EEBED3
89AEE4B47D46FB240CACC3A3EFF26A96,408,599,486,a38,,89AEE4B47D46FB240CACC3A3EFF26A96
tagUGVoidlands01B
43E91C4B0D49C386833B47A97D39A786,458,360,493,a82,,43E91C4B0D49C386833B47A97D39A786
D671086A354C2ECD37C1369C5C1A94A7,252,272,491,a82,,D671086A354C2ECD37C1369C5C1A94A7
tagUGVoidlands01C
D8D1D767F144E3743690DBA47A71B34F,450,348,500,a97,,D8D1D767F144E3743690DBA47A71B34F
6678B2826D419722067DF297CAAC406F,356,505,498,a97,,6678B2826D419722067DF297CAAC406F
E3AA7DCB9B44DB121BF9B6AE26F8454E,210,365,497,a97,,E3AA7DCB9B44DB121BF9B6AE26F8454E
tagMapVoidlands02
3C567BC94D45DAA4D29883A9914677EE,362,606,473,a15,,3C567BC94D45DAA4D29883A9914677EE
AC0A4D541145F81EE4788EA1A020B76A,274,252,472,a15,,AC0A4D541145F81EE4788EA1A020B76A
AC39B61B964151BD2762DB82561C070C,479,636,476,a15,,AC39B61B964151BD2762DB82561C070C
2B1D35BFC14059C80AF05987FB25EDEF,311,459,473,a15,,2B1D35BFC14059C80AF05987FB25EDEF
tagMapVoidlands
F3FEEC75144F226801865EB95480278A,228,343,14,a78,,F3FEEC75144F226801865EB95480278A
EE20A2F7D8447F615D7DB4AA5C300C55,380,245,31,a78,,EE20A2F7D8447F615D7DB4AA5C300C55
54E38496B94E261CF56C1EA3AEADE90E,405,412,31,a78,,54E38496B94E261CF56C1EA3AEADE90E
tagMapVoidlands03
165FC489F94FC28F82582CAEA86F27F7,319,351,522,a5,,165FC489F94FC28F82582CAEA86F27F7
8A8E17A56E45631DCD62989B84E11ED7,455,391,523,a5,,8A8E17A56E45631DCD62989B84E11ED7
F5AB50038A4AED8CC13D8BB201FFF16C,282,555,524,a5,,F5AB50038A4AED8CC13D8BB201FFF16C
tagMapNecropolisGate
28491A68F946025B5F9A7CB4842E7E8A,9844,1791,348,a79,,28491A68F946025B5F9A7CB4842E7E8A
21A10A13224A86862CC1F78C83AA91AC,9702,2071,347,a79,,21A10A13224A86862CC1F78C83AA91AC
CFD4EBA0B94B951C398D5793B933E5D9,9873,1936,346,a79,,CFD4EBA0B94B951C398D5793B933E5D9
4DA0FEA26E48DDB6ED6099B000BA7575,9938,1993,346,a79,,4DA0FEA26E48DDB6ED6099B000BA7575
tagUGCryptFinal02
9638B60C504D8F6021082EB0B288C49D,466,622,546,a59,,9638B60C504D8F6021082EB0B288C49D
A1DA4DD15742C8AA1709DC875D9AFFC3,584,645,546,a59,,A1DA4DD15742C8AA1709DC875D9AFFC3
A562FD7AC541D0F62B351698B7ABA970,419,375,547,a59,,A562FD7AC541D0F62B351698B7ABA970
2458CC8BC040AD1F25DF8E8CD94FCB7D,265,297,545,a59,,2458CC8BC040AD1F25DF8E8CD94FCB7D
tagUGCryptFinal01
5D9D153F8242D71631103BAA03748257,331,694,540,a102,,5D9D153F8242D71631103BAA03748257
3DC9084E0F491A1DE8A3538499979E7F,187,428,541,a102,,3DC9084E0F491A1DE8A3538499979E7F
785D621353434D9A211641AAFBF3EBDE,436,213,542,a102,,785D621353434D9A211641AAFBF3EBDE
598FAF17774687F6D98EE194C700E952,309,292,542,a102,,598FAF17774687F6D98EE194C700E952
06A36B5C20406235D817A5BF8E8A44E6,375,591,540,a102,,06A36B5C20406235D817A5BF8E8A44E6
tagUGFortCultist01
7DDD04DF4F4E3C28E67E22A2A470471B,226,540,438,a80,,7DDD04DF4F4E3C28E67E22A2A470471B
F8652FF5F74CEF50EDE38BB18F5DF9E2,442,564,454,a32,,F8652FF5F74CEF50EDE38BB18F5DF9E2
E3838A36124249E4ED207A9F88BFA0E1,397,412,439,a80,,E3838A36124249E4ED207A9F88BFA0E1
3BCF1702DC45DDFEC30B8FBBC61FA0B2,247,284,455,a32,,3BCF1702DC45DDFEC30B8FBBC61FA0B2
D6C4E5D019479D8C5B8A6AB1FD32B690,486,520,441,a32,,D6C4E5D019479D8C5B8A6AB1FD32B690
tagUGVoidlands01
DA201D455140D755B279AD9B1459FE80,672,647,496,a23,,DA201D455140D755B279AD9B1459FE80
6406A18ED74E8C24EF97C7B4E77B0F79,433,448,482,a23,,6406A18ED74E8C24EF97C7B4E77B0F79
tagUGCellar02
8E0148D7454F1405922D4C83376ADC86,282,217,207,a17,,8E0148D7454F1405922D4C83376ADC86
C65CD873DD4A9B57B30D3897F7278F42,269,232,207,a17,,C65CD873DD4A9B57B30D3897F7278F42
089FD00D7942E715270D6FA323427393,282,242,207,a17,,089FD00D7942E715270D6FA323427393
tagMapBloodGrove
AAA21EF2444FCDAD7504F880DBF866BF,11285,6892,239,a79,,AAA21EF2444FCDAD7504F880DBF866BF
CC5D214A574E8E777719CDBD37252F5B,11418,6948,378,a79,,CC5D214A574E8E777719CDBD37252F5B
BC921D344E442934198FD9973015C493,11371,6701,401,a79,,BC921D344E442934198FD9973015C493
4C273B1B5F4B7D413B21DC864DFB6C9A,11302,6957,378,a79,,4C273B1B5F4B7D413B21DC864DFB6C9A
7AE70B4EDE4D460E690ACE892841FA01,11528,6697,401,a79,,7AE70B4EDE4D460E690ACE892841FA01
1C4640BC124E0F15B7825E9DD02C1D3B,11503,6838,401,a79,,1C4640BC124E0F15B7825E9DD02C1D3B