5th spot on ucas form

Hi. I love computer science especially AI and also maths. I’ve applied to 4 unis so far - Bristol Bath and Imperial, who all seem to be waiting until after Jan 31, and Southampton (have an offer). I’m predicted 3 a* and an A, and an A at EPQ . although some days I feel less confident
Not sure what to do with 5th place. I got a 6 in English gcse but otherwise decent grades. Since unis are so expensive, if I don’t get a course I like I’d rather resit. So-
- should I apply to Brunel or somewhere as a safety offer, or apply to do AI at kings which also seems to have a high grade offer, to increase my chances of getting a place from a higher ranking uni? ( risking 4 rejections potentially or a couple of high ranking offers.