The final boss has only 1 card selected I think there’s a reroll there you will need that if so

[timber harness]

Two par carries the whole way till the very last boss where one card is always selected you don’t have to reroll anything and you will print money

You can keep going I was just not paying attention at the end also in theory you can buff 2 pair forever

I got everything from just opting the packs in shops and most of the strong cards were just in the shop there was a rocket and you can very easily get multiple poly cromes