Pack Aggro - Commands

Base mobs:

/summon Creeper ~ ~1 ~ {PersistenceRequired:1,CustomName:"Mob1",Attributes:[{Name:generic.movementSpeed,Base:0}]}
/summon Creeper ~ ~1 ~ {PersistenceRequired:1,CustomName:"Mob2",Attributes:[{Name:generic.movementSpeed,Base:0}]}

Player Aggro:
/execute @a ~ ~ ~ entitydata @e[type=Creeper,r=4] {Attributes:[{Name:generic.movementSpeed,Base:0.25},{Name:generic.followRange,Base:100}]}

Pack Aggro 1:
/execute @e[type=Creeper,name=Mob1] ~ ~ ~ entitydata @e[type=Creeper,name=Mob2,r=3] {Attributes:[{Name:generic.movementSpeed,Base:0.2},{Name:generic.followRange,Base:100}]}

Pack Aggro 2:
/execute @e[type=Creeper,name=Mob2] ~ ~ ~ entitydata @e[type=Creeper,name=Mob1,r=3] {Attributes:[{Name:generic.movementSpeed,Base:0.2},{Name:generic.followRange,Base:100}]}

Mob 1 Reset:
/execute @a ~ ~ ~ entitydata @e[type=Creeper,rm=11,name=Mob1] {Pos:[247.5,1.0,224.5],HealF:20}
/entitydata @e[type=Creeper,name=Mob1] {Attributes:[{Name:generic.movementSpeed,Base:0}]}

Mob 2 Reset:
/execute @a ~ ~ ~ entitydata @e[type=Creeper,rm=11,name=Mob2] {Pos:[247.5,1.0,235.5],HealF:20}
/entitydata @e[type=Creeper,name=Mob2] {Attributes:[{Name:generic.movementSpeed,Base:0}]}