Hmmmm, where to start........
Well, without going too into the details, I would use a knife, blowtorch, ballpean hammer and hydrochloric acid to make him scream for for a week. Every moment he spent awake would be filled with sheer agony. I'd give him a transfusion of my own blood if that kept him alive to suffer longer.
I'd put a tire around his neck, douse him in gasoline and set his pansy ass on fire for a grand finale.
Zig