a steam elemental

• 556, -1540, -170 (2 of 11 spawns here)
• 976, -1443, -136 (seen once) (2 of 15 spawns here)
• 990, -1511, -113 (seen once) (2 of 18 spawns here)
• 903, -1622, -109 (seen once) (1 of 13 spawns here)
• 996, -1714, -108 (seen once) (1 of 4 spawns here)
• 1038, -1642, -108 (seen once) (1 of 8 spawns here)
• 305, -1609, -113 (seen once) (1 of 8 spawns here)
• 411, -1492, -136 (seen once) (1 of 5 spawns here)
• 1527, -1501, -108 (seen once) (1 of 5 spawns here)
• 771, -1185, -89 (seen once) (1 of 3 spawns here)
• 1164, -1476, -108 (seen once) (1 of 3 spawns here)
• 1210, -1382, -108 (seen once) (1 of 8 spawns here)
• 599, -1364, -174 (seen once) (1 of 5 spawns here)
• 522, -1687, -107 (seen once) (1 of 7 spawns here)
• 890, -1551, -109 (seen once) (1 of 11 spawns here)
• 1178, -1694, -108 (seen once) (1 of 4 spawns here)
• 464, -1628, -119 (seen once) (1 of 7 spawns here)
• 1683, -1553, -108 (seen once) (1 of 14 spawns here)
• 1652, -1443, -107 (seen once) (1 of 7 spawns here)
• 1334, -1632, -108 (seen once) (1 of 6 spawns here)
• 391, -1420, -142 (seen once) (1 of 9 spawns here)
• 360, -1713, -109 (seen once) (1 of 6 spawns here)
• 434, -1576, -118 (seen once) (1 of 7 spawns here)
• 1708, -1593, -108 (seen once) (1 of 6 spawns here)
• 980, -1316, -108 (seen once) (1 of 9 spawns here)
• 554, -1514, -196 (seen once) (1 of 5 spawns here)
• 357, -1419, -143 (seen once) (1 of 6 spawns here)
• 995, -1587, -108 (seen once) (1 of 7 spawns here)
• 1639, -1701, -99 (seen once) (1 of 10 spawns here)
• 442, -1680, -110 (seen once) (1 of 9 spawns here)

As /loc gives them: Y, X, Z, the most used first; nearby spawns share a spot, and one seen in a single visit may be where the mob had been pulled to.