You are able to integrate with Multiple payment options in the Integration section of WishList Member.
You just need to change the drop down to the Integration choice you want to use. Then, switch to the next option when you are finished setting up the first method and so on.
You would create a payment link/button for each Membership Level you want potential Members to be able to register for using each Payment option of your choice.
So, if there is a Gold Membership Level, you could have a payment link/button for as many payment options as you like that the user could choose between.