Portfolio review / Suggestions

I’m doing SIP for the past 2 years in the below funds: 1. Quant small cap - ₹5000 2. Nippon small cal - ₹5000 3. Axis Mid cap - ₹5000 4. UTI NIFTY 50 - ₹15,000 Lumpsum on Mirae asset ELSS ( Yearly 30k) Till now the total invested amount is ₹7,37,000 and Current value is ₹8,97,000. Except NIFTY 50, all the other funds are giving returns above 18%. Should I continue with index fund ? I’m planning to invest this for long term.