BA Hons is undoubtedly a great course but considering the fact that your merit number 439 in the waiting list your chances remain moderate to low. As you know AMU is a prestigious institution so you need to keep patience and wait till activation of the waiting list. My suggestion would be to try for other colleges by that time rather than solely depending on one college

https://www.careers360.com/university/aligarh-muslim-university-aligarh

Good luck!!