Question: with only 2 crank rings instead of 3 on my old bike, I'm trying to make sure I select the proper gear combos. Maybe with only 2 it's not as big of a risk for crossing the chain as much to the cassette.

Looking at the Sheldon Brown site and gear calculator, it looks like for this bike the following gears ratios are equivalent (first digit is crank, second digit is cassette):

26 = 19
25 = 18
24 = 17
23 = 16
22 = 15
21 = 14

Assuming I should still minimize crossing, is it recommended to only use combos 29 through 24 and then if I hit a tough hill toggle the crank to use only 16 through 11? Thanks!