Board Thread:General Discussion/@comment-11529562-20130704101541/@comment-11126608-20130710202404

I also find that creating a bridge along Hell, usually 500 blocks from the centre to the left, and 500 blocks from the centre to the right, and then drop the doll in around the centre.

This way, regardless of which way he spawns, you will end up on the bridge with more than enough runway to take him out.