The following is maps of Goroma, one of the Shattered Isles. Morgaroth spawns in the floor -7, in the southwestern part of the map.
5 Floors above ground level, Top of the volcano in Goroma. There are 4 Stone Golems on this floor.
4 Floors above ground level, volcano in Goroma. There are 2 Stone Golems on this floor.
3 Floors above ground level, volcano in Goroma. There are 4 Stone Golems, and 1 Fire Elemental on this floor.
2 Floors above ground level, volcano in Goroma. There are 4 Fire Elementals, 4 Stone Golems and 1 Fire Devil on this floor.
1 Floor above ground level. There are ~7 Fire Elementals and ~10 Stone Golems on this floor.
Goroma volcano (You can also see a part of the boat on the north-east).
Ground Floor of Goroma. In the volcano there are ~14 Fire Elementals and ~20 Stone Golems on this floor.
1 Floor below ground level. In the eastern tunnel there are 7 Fire Devils, 7 Fire Elementals and 2 Stone Golems on this floor.
2 Floors below ground level. In the eastern tunnel there are 7 Acolyte of the Cults, ~2 Fire Elementals, 5 Witches and 3 Fire Devils on this floor.
In the eastern tunnel there is 1 Witch, 1 Demon Skeleton, 2 Elder Bonelords and more.