As Mastercard support mortgage payments through Plastiq, what are good reward credit cards to support this on-going monthly bill? Since I am paying the mortgage, I might as well get some return (points, miles and/or cashback).

Looking through my credit cards, the only Mastercard is my IHG. IHG only provides 1 point per dollar spend on non-IHG bonus expense so this card isn't ideal as Plastiq charges 2.5% fee (not counting current Masterpass promo). I am looking for net-positive (or break-even) to cover the 2.5% fee.

A quick research shows that the Barclays Arrival Premier might be a good choice. Arrival Premier earns two miles per dollar on all spending, with a 15,000 mile bonus awarded at $15,000 and another 10,000 at $25,000 in a year. If I spend $25,000 (easily with mortgage), the the miles earning/multiple is 3x (75,000 miles with $25,000 spend).

Is my math correct? Is it good/worth it? Are there other reward credit cards (doesn't have to be Mastercard) that would be better to support on-going mortgage payments?