When I looked back, my most used card is HDFC Tata Neu Infinity itself. Almost spending around 70k-80k per month on that. Another one is ICICI Amazon Pay - a very no-nonsense card. Mainly for Amazon purchases, flight and hotel bookings.
Next is HDFC Swiggy but now a days, swiggy spends are very less. So this is resting in wallet.
Maximize, Amazon. I buy multiple of 5K or 10K. Use it for Insurance, recharge/bills. Recently for car service too I paid via cashfree link using APay instead of direct card.
My top three....
1. Infinia - almost everything, everywhere - online and offline.
2. Octane - obviously fuel; plus, grocery, movies (offers), and then some.
3. Amex Plat Travel - Income Tax (after TDS), and sundry things. 🙂
Axis Ace online and offline
Amazon ICICI for offline gold purchase if GV not accepted and amazon.
Indusind for offers.
LIT for everything planned.
Tata neu, daily small UPI.
Tried to get SBI CB as my online purchases are very high, but couldn't get it due to high credit leverage.