Tax hacks most buyers don't use for Greater Noida properties

Sector 107 keeps coming up every time I shortlist something. I work in real estate, but buying my own flat in Godrej Nest has me thinking about long-term tax planning. Section 24, 80C ka toh pata hai, but capital gains pe bahut confusion hai. Koi batayega 54EC bonds ka real application Greater Noida properties ke liye? Also, three years hold karne ke baad, is it really worth selling, ya phir 5-7 years mein better gains milte hain? Builders like ATS aur Gaursons ke projects mein yeh tax benefits kaise apply hote hain? Any specific Greater Noida insights?