I think the question here is simple: How much risk for damage do you agree with? How much (short term) damage are you ok with? Here are a few suggestions:
A mix of honey and rough salt, put it on your clit and edge while your clit is covered in it. The honey should make things sticky and the salts should slightly grind on and slightly cut your skin. And as it is salt, it burns once the skin is damaged. You are not hurting enough yet? Go on, more edges.
Go light a candle, let the wax drip on your arm first to make sure it is not actually burning you. If you can handle the heat on your arm, go cover your clit in wax. You are done when your clit, your vulva and pretty much all of your cunt is covered in wax.
Only for the truly self-torturous: Needles. You can probably get a pack of 100 of sterile needles in your local pharmacy. Pussy lips, hood, clit, vulva, thighs... All can take needles if you are hardcore enough. There is a chance for nerve damage on your clit though. If you are fine with the risk of feeling less in the long run, have fun pricking all the sensitive spots. Be aware, cunt-needle-play tends to be bloody.
You can also try to overstimulate your clit. Go edge for 10+ hours a day. Make it go sensitive and slowly grind down on it until it gets bloody. If you rub it long enough, even without any other tools/toys/torture, edges should be enough to eventually grind down your skin...
If it is just simple pain you want, hot sauce/wasabi/peppers can be quite some fun. Pretty much anything that is worthy of having its Scoville value evaluated. Again, massaged into your clit obviously.
I hope you can do something with my input.
Happy suffering
Meorin