From my knowledge, the best way to pay CC bills and earn rewards are
1) RBL Signature+ DC - 1000 rs/month
2) Indusind Signature DC - 3000 pts(1050 rs/month)
3) HDFC Platinum DC - 750 rs/month
4) Fi Money DC(salary/infinite) - 500 rs/month
If there are any other ways for paying CC bills to earn using DC apart from the above, please share.
Hope it helps.