/setblock ~ ~1 ~ minecraft:mob_spawner 0 replace {EntityId:Creeper,SpawnData:{Equipment:[{id:276,Count:1}]},SpawnPotentials:[{Type:Skeleton,Weight:1,Properties:{Equipment:[{},{},{},{},{}]}}],SpawnCount:2,SpawnRange:3,RequiredPlayerRange:64,Delay:10,MinSpawnDelay:10,MaxSpawnDelay:100,MaxNearbyEntities:2}