I'm a little late but I might as well suggest something since I love this story some much :3
Personally these would be the worst totures for me, so I thought they might be good for the story
- Teeth extraction or breaking, cracking or splitting
- Let outside, then have dogs set loose on him- adding a drug to this might be interesting x3 Like a crazy outer-worldly experience snickersnicker
- Body piercings without anesthetic
- Instead of castrating him, you could do circumcision instead?
- Removal of useless organs, like appendix or tonsils
- Maybe having him call his family members and having to tell them all the horrible things they are doing to him, and how he wants to die and yada yada yada. That is probably more torture for the family but oh well
- Being shot through hands, feet or other non-life threatening places.
Hopefully these are helpful! ^^
PS. I think you should go for the full 100 W00T!