I have infinia and 3 Amex cards: Gold, MRCC and Plat travel.
I buy 20k + 6k + 6k Amazon pay vouchers from gyftr every month using Infinia, gold and MRCC for bills, swiggy, medicines on 1 mg, etc.
Any offline spend or big insurance spend, I try to put on plat travel upto 4L.
Any online spend where I can use vouchers, I get them from HDFC Gyftr.