Here is the site where you can find tables for the Illustrious 18 and Fab 4 Surrender.
http://bjmath.com/bjmath/tcindex/i18index.htm
No the indices will not change for 6 deck unless it is risk averse. The number will change for double deck and single deck. For Single deck and Double deck I suggest you use the indices outside of the Illustrious 18 to maximize your profit.
Bookmarks