Best Card reward option for flight booking?

[magicpants]

I have quite a few upcoming trips planned and need to book flights and hotels for the same.
Some of them are to Bangkok, Egypt, Philippines. Will need to book at least 2-3 seats for each journey.
What is the best card strategy i can use to maximize discounts and returns?

Credit cards I have -
SBI Elite
AMEX Plat Travel
ICICI Sapphiro
ICICI Apay
Ixigo Au Card
IDFC First Select
HDFC Business Regalia
SBI BPCL Octane

Thank you all in advance for your advice and time, I'm new to the card reward game 🙂

 

[helloworld]

Plat Travel - 4L
Rest - any card, all of them same - no use (try HDCF smartbuy first then move to other cards once limit crossed for the regalia card).