Touring bike which is running XT M-8000 double crankset. It is geared too low. Chainrings are 36t and 26t with cassette ranging from 11t to 40t. I don't think the other M-8000 double chainring option of 38t and 28t will make much of a difference.

1. Is it possible to swap these chainrings for the 40t and 30t chainrings normally associated with the XT M-8000 triple crankset?
2. Is there an option with a different cassette?
3. Are there other alternatives?

Thanks!