Which credit card earns the most Qantas points on spend?

With Amex no longer in use from 5th August on ANZ cards, would I be better off changing to the ANZ Frequent Flyer Black from Platinum as there is a larger monthly points cap using Visa (7500 v 3000)?
Alternatively would I rack up more Qantas points elsewhere? I spend about $6k monthly on the card(s)

This site isn’t allowed to give specific individual financial advice.  suggest you read this. http://www.pointhacks.com.au/credit-cards/qantas-frequent-flyer-cards/