I need advice on my portfolio considering 7yr+ holdings

Navi nifty 50 index plan has 0.06% expense ratio. What is your total worth in INR ? For Flexi Cap you can choose Parag Parikh/ HDFC. What is your total capital gain in 7 years ?

Looks solid. You can add gold/silver etfs to diversify

How well did your quant mfs perform, specially that flexi one?

Why do you have overlapping funds?
Nifty 150 will have same companies as Nifty 50. You should invest in next nifty 50 instead. Also flexi cap will have few companies that are in small cap. You also have 2 small cap funds. Check the holdings else they are not really diversified. You are paying expense rario twice for unnecessary reasons.