Which card comes with sign up bonus and earn points from ATO/Super payments?

I already have Velocity Platinum Amex, so need to be careful about choosing the right card that I will still be eligible for sign up bonus.
Have around $25k to pay to ATO (can spread over several months but would be good to do it within around 4-5 months). Also as a sole trader I want to make a lump sum super contribution for myself before end June.
Trying to work out the best card to choose to maximise points.
I mostly collect Velocity on an ongoing basis but open to a QF signup bonus if its much better deal.
I have read about the schemes to pay ATO (and presumably super?) via B2BPay etc if necessary, but as I am ready to take out a card expressly for this I don’t know if that’s the best option or not.
Would appreciate any tips.

Hey there. This page on ATO payments might be of some help. https://www.pointhacks.com.au/ato-points-earning-cards/ (be mindful that when comparing the costs per bank points as these doesn’t necessarily transfer 1:1 to miles/pts).

I would short list a few cards and then check on pages like https://www.pointhacks.com.au/credit-cards/ to see whether there are any lucrative sign up bonus on offer.