I've a border score for neet 2020.so giving last rank colleges first priorities in my allotment list will do any good??

If you have a marginal score in Neet 2020, then it would be difficult to get any college through all India quota. Through all India quota the cutoffs are usually higher and that is why any score at least less than 590 or 600 out of 720 is less. Even for Dental, you need to secure at least 550 marks in Neet if you belong to general category. But if you wish to appear in All India counselling, then you should put the low rank colleges first. However you can try for state counselling as for state quota candidates the cutoffs are comparatively low and the private medical colleges participate in state counselling so you have chances to get seat in private medical colleges. To get complete list of colleges you can based on your rank use this link http://medicine.careers360.com/neet-college-predictor?icn=QnA&ici=qna_answer