What clothes you're wearing makes fuck all difference to your chances of being raped.
Martial arts are also pretty useless. Men are significantly stronger than women. I do a strength-based sport to a reasonable level, and I couldn't come close to fighting off the average unfit man.
Also, very few rapes begin with a stranger trying to jump a woman in an alley - in most cases it's someone the woman knows, and the thing that stops her kneeing him in the balls or elbowing him in the face at the outset isn't lack of ability to do so, but politeness. Female socialisation. An internal voice telling her not to make a fuss, because surely he's just misunderstood what she said/did? Martial arts will be fuck all help in that scenario.
So what does make someone "more likely to be raped" then?
- Having a vagina, obviously. Most rape victims are women. But there's not much we can do about that.
- Knowing, spending time with, and trusting some men. Pretty unavoidable if you want to live a normal life, but statistically women are most likely to be raped by a man they know, so knowing men will increase your risk.
- Being vulnerable in some way - easy to exploit and/or easy for others to disbelieve. There are some vulnerabilities that we have control over (not getting too drunk, not walking through dark alleys alone), but others that we cannot control (mental illness, homelessness, addiction, being in care/fostering, female socialisation/people pleasing, power imbalance, poor boundaries or inability to recognise red flags due to upbringing or previous abuse etc.).
So essentially, the only effective advice you can give to avoid rape is to reduce the vulnerabilities that are within our control. Don't get too drunk/take lots of drugs; try to stay aware of your surroundings and who is near you; take the safest routes you can; ideally stick to where there are other people around for security.
Which is sensible advice for anyone, male or female. So it's not really "advice to avoid rape", is it? It's just generic personal safety advice.
You could try to tell women to recognise and react to red flags / boundary pushing in men before those men cross the line into rape, but their ability to recognise those behaviours will be largely dependent on their previous experience. Someone who has grown up with abuse is likely to struggle to recognise boundary crossing, through no fault of their own.