/setblock -158 21 385 mob_spawner 0 replace {SpawnCount:1,MaxNearbyEntities:1,SpawnRange:6,Delay:20,MinSpawnDelay:1760,MaxSpawnDelay:1800,RequiredPlayerRange:15,EntityId:Skeleton,SpawnData:{SkeletonType:1,HealF:400,Attributes:[{Name:"generic.maxHealth",Base:400},{Name:"generic.knockbackResistance",Base:0.55f},{Name:"generic.movementSpeed",Base:0.6f},{Name:"generic.attackDamage",Base:10}],Fire:200,Equipment:[{},{Count:1,tag:{ench:[{id:0,lvl:4},{id:7,lvl:3},{id:34,lvl:3}]},id:"minecraft:diamond_boots"},{Count:1,tag:{ench:[{id:0,lvl:4},{id:7,lvl:3},{id:34,lvl:3}]},id:"minecraft:diamond_leggings"},{Count:1,tag:{ench:[{id:0,lvl:4},{id:7,lvl:3},{id:34,lvl:3}]},id:"minecraft:diamond_chestplate"},{id:"minecraft:skull",Damage:1,Count:1}],DropChances:[0F,0.05F,0.1F,0.1F,0.25F]}}