I have friends from Asutosh College and according to them, the Economics department is quite good. But, professors will not be of any use unless you attend lectures every day.
You will need to find the best tuition and put in twice as much effort as folks from other universities. To maintain decent grades, one of my friends changed three coachings and joined various libraries.
Don't join Asutosh College if you've relied heavily on school teachers your entire school life, and only join if you're confident you can put in the effort day and night to produce your own notes and edit the ones your tuition teachers offer you.
Otherwise, the ambiance of the institute is good. Classes are held regularly. Overall, Asutose College is a decent choice if you want to pursue Economics honors.