Can someone with a 2-year gap after graduation and 1 year of work experience still get calls from top B-schools like IIM A, B, and C?

Definitely! Calls from IIMs are not dependent on the gap year but a lot of other factors. However, justifying gap year during interviews is crucial. If you have a genuine reason, then you can always justify it during interviews. 

Will reading Durjoy Dutta books help crack CAT VARC??

never heard of her. But if reviews are good, definitely have a go.

Bhaiya 

Do EWS candidates with average profiles (like 70/70/70) have a realistic chance at new IIMs if they score 90+ in CAT?

Don't aim for 90. That should be your worst case scenario. Always aim for the best. You'll land up somewhere good. Any doubts regarding preparation strategy, you can shoot it here. 

Ca  you describe in detail what your first month of CAT preparation looked like? How did you assess your starting point, choose your resources, and decide your initial strategy?

First have a wide view of course in VARC, DILR, QA.
Then skim through CAT papers of last year. Try attempting those questions without time limit and gauge how you feel. Its ok if you can't solve. But just see if those concepts, questions look familiar. That will give confidence that how much effort is needed to be put in and in what direction.

For resources, I studied Arun sharma book for QA and DILR. For VARC i took an online course. 

For studying you can choose self study or coaching as per you convinience. But have mock test series of atleast 2 coachings. 

Initial strategy was simple, went with my gut feeling. Later improvised on it seeing mock results. Same you follow too.
Mostly try to explore different strategies and have a best one ready by mid october. Will work fine !!

Trust me, CAT is about hard work and consistency. Work hard and attempt smart. That is CAT all about !!

Will reading Durjoy Dutta books help crack CAT VARC??