It is quite difficult but you can try for spot round in nits. Last year, the closing ranks went upto 70k in nits like silchar and harmipur. Besides some of them have home state reservation so their closing ranks go upto lakhs ( but for homestate residents only). For further information , you can visit josaa.nic.in and check previous years' cutoff.

With your rank, you also qualify for private colleges like jaypee, bennett, bmu, etc. So you can try them too.