Beating the Butcher?

[MERCILESS]

YES! Do this.  It helps :)
I'd say put everything into Dex until it is maxed out, unless you need to pump some points into magic for holy bolt and firewall.  But don't pump magic to more than 30.  Once Dex is maxed, you can distribute the rest as you like.  That's just my opinion :)

Also, a note about Leoric: he can open doors.  That is all.

Cheers....Will do!!