First of all, select your desired colleges and later fill in the ones of the North-East and finally also select the ones in the states of Bay of Bengal like the one in Orissa, etc. as the cutoff tend to be high

Well, you actually should fill in if you just want to get into an NIT or an IIIT. You have to understand that you aren't going to be getting in any of the top colleges but surely the later ones will happily take you. Other than this even in the not so good colleges of CSAB you may not be getting your desired branch but let me assure you for sure that you will get a seat in some or the other NIT. 

Hope it helps... Good Luck!