Hey  aspirant,

According to my research on all of these colleges, I would suggest you to go for NIET(Noida Institute of engineering and technology) because it is a pretty good college, the faculties are friendly also the placement statistics is increasing every year. On comparing these three colleges

College       highest package           avg package

IIMT                  16 LPA                                 3-4LPA

NIET                   22LPA                                      3.5-5

AKGEC                10lpa                                       3.3lpa

Now,you can clearly see that there is not much difference in IIMT and NIET but still NIET has better placement statistics than IIMT.

Also, it is NAAC A accredited along with NBA and NIRF ranking is 49.And also this year, it has been turned to an autonomous college which has another advantages.

Hope it helps.

Good luck!