NPCs composing that spawngroup :

#An_Age_Old_Rockhopper (25%)

#Rock_Garn_Timer (4%)

a_Rockhopper (71%)

NPCs spawning around that spawngroup :
(Max range : 100)

dawnshroud1392099, range=64 (1455,-2385,-30)

dawnshroud1392098, range=34 (1371,-2360,-29)

dawnshroud1392097, range=71 (1393,-2276,-32)

#Rock_Garn_Timer_1433535, range=0 (1403,-2347,-12)

#Rock_Worker_1433538, range=48 (1369,-2313,-29)

#Rock_Worker (2%)

Cave_Summoner_1433541, range=81 (1463,-2292,-25)

Cave_Summoner (2%)

dawnshroud_54817, range=71 (1393,-2276,-32)

#A_Rockhopper_ (50%)
a_Rockhopper (50%)

dawnshroud_54818, range=34 (1371,-2360,-29)

dawnshroud_54819, range=64 (1455,-2385,-30)