Buster bet odds for altered deck

Hello I have an opportunity at a casino near where I live in california to player-bank a game that has a normal continuous shuffle 6-deck, except that it has 18 deuces spiked in. Im trying to understand how this affects the specifically the dealer bust probabilities. Dealer hits on soft 17.

I was wondering if anyone is able to calculate the probability of dealer busting in 3,4,5,6,7 and 8 cards using this deck? Interestingly, I found that the overall probability of busting doesn't change much, from 29.96% in a normal deck to 30% in the deuce-rich deck. I used an online tool to check overall busting frequency with this deck but it can't determine the individual card probabilities.

Thanks so much if you can provide any help!

https://miplet.net/blackjack/ and click on the appropriate link. The deck composition can be edited.

Thank you!