Super Smash Mobs in Vanilla Minecraft 1.9 v1.1

summon FallingSand ~ ~1 ~ {Block:stone,Time:1,Passengers:[{id:FallingSand,Block:redstone_block,Time:1,Passengers:[{id:FallingSand,Block:activator_rail,Time:1,Passengers:[{id:MinecartCommandBlock,Command:gamerule commandBlockOutput false},{id:MinecartCommandBlock,Command:"fill ~2 ~-3 ~-1 ~8 ~-1 ~1 stained_hardened_clay 7 hollow"},{id:MinecartCommandBlock,Command:"fill ~2 ~-2 ~-1 ~8 ~-2 ~1 stained_glass 6 replace stained_hardened_clay"},{id:MinecartCommandBlock,Command:" /give @a skull 1 3 {SkullOwner:\"Graystriped\", display:{Name:\"Super Smash Mobs\"}}"},{id:MinecartCommandBlock,Command:" /scoreboard objectives add StartSuperSmashMobs stat.talkedToVillager"},{id:MinecartCommandBlock,Command:" /scoreboard objectives add HoldingSuperSmashMobs dummy"},{id:MinecartCommandBlock,Command:" /scoreboard teams add Collide"},{id:MinecartCommandBlock,Command:" /scoreboard teams option Collide collisionRule never"},{id:MinecartCommandBlock,Command:" /scoreboard teams join Collide @a"},{id:MinecartCommandBlock,Command:" /summon Villager ~ ~ ~ {NoAI:1,Invisible:1,Invulnerable:1,Offers:{},Tags:Rightclick\"],Team:\"Collide\"}"},{id:MinecartCommandBlock,Command:setblock ~1 ~-2 ~ wall_sign 4 replace {Text1:"{\\\"text\\\":\\\"[Destroy]\\\",\\\"color\\\":\\\"dark_red\\\",\\\"bold\\\":true,\\\"underlined\\\":true}",Text4:"{\\\"text\\\":\\\"\\\",\\\"clickEvent\\\":{\\\"action\\\":\\\"run_command\\\",\\\"value\\\":\\\"fill ~ ~-1 ~-1 ~7 ~1 ~1 air\\\"}}"}},{id:MinecartCommandBlock,Command:setblock ~7 ~-2 ~ chain_command_block 3 replace {auto:1,Command:"/scoreboard players set @a[score_StartSuperSmashMobs_min=1] StartSuperSmashMobs 0"}},{id:MinecartCommandBlock,Command:setblock ~6 ~-2 ~ chain_command_block 5 replace {auto:1,Command:"/scoreboard players remove @a[score_HoldingSuperSmashMobs_min=1] HoldingSuperSmashMobs 1"}},{id:MinecartCommandBlock,Command:setblock ~5 ~-2 ~ chain_command_block 5 replace {auto:1,Command:"/execute @a[score_RightClick_min=1] ~ ~ ~ give @p skull 1 3 {SkullOwner:\\\"Skeleton\\\", display:{Name:\\\"Skeleton Kit}}"}},{id:MinecartCommandBlock,Command:setblock ~4 ~-2 ~ chain_command_block 5 replace {auto:1,Command:"/tp @e[tag=Rightclick] @p[HoldingSuperSmashMobs]"}},{id:MinecartCommandBlock,Command:setblock ~3 ~-2 ~ repeating_command_block 5 replace {auto:1,Command:"/scoreboard players set @a HoldingSuperSmashMobs 2 {SelectedItem:{\\\"minecraft.skull\\\", tag: {SkullOwner:\\\"Graystriped\\\", display:{Name:\\\"Super Smash Mobs\\\"}}}}"}},{id:MinecartCommandBlock,Command:setblock ~ ~ ~1 command_block 0 replace {Command:fill ~ ~-3 ~-1 ~ ~ ~ air}},{id:MinecartCommandBlock,Command:setblock ~ ~-1 ~1 redstone_block},{id:MinecartCommandBlock,Command:kill @e[type=MinecartCommandBlock,r=1]}]}]}]}