he won't get skulls, they are counted as "rare drops" and won't drop if not kill by either a player or a "fake" player
manually instal soul shards and Thaumcraft 3
hunt wither's until you get a good enough soul shard (really T5 is ideal, but its not required i would say the min would be a T3 shard)
construct a high tower (if you want EXP from them then they need to fall ~18 or so blocks have some strength iron goloms and place visors on them (you do need to research that stuff keep in mind) place a bunch of brains in a jar to soak up the xp from them (i will let you decide what you want to do with the excess xp)
if you make the tower high enough you can kill them outright and now have to worry about the exp stuffs....however doing it that way mean you won't get skulls from them....
if you got factorization i would suggest a barrels for keeping the loots.
you get alot of bones and coal REALLY FAST! so make sure you got the storage capacity to hold them
i am half tried, so chances are i missed somethings