Dear aspirant,

If could please tell me your marks or rank because all previous cutoffs are in marks or ranks. Anyways keep the reverting back part aside, If your score is somewhere around 150+ considering you have no linguistic minorities, you will be able to get computer science in the top 5 colleges in mumbai 

Note top 5 colleges in mumbai are Dj sanghvi,Vjti(here jee doesn't apply),spit.spce, Kj somaiya vidhyavihar, 

Also father agnel bandra is worth considering.

At 160- 170 you can get cs in spit, or any college other than vjti

in vjti you could be required to get 170+

for IT same marks apply only deduce 5-7 marks

At scores like 120 Extc and CS will be available in colleges like thakur and francis ranked 9-12th