Decrab during flare, between 10' and 20' RA, the aircraft can happily take a crab angle of 5 degrees or less in any condition and it is certified to land in a crab according to the guidelines provided in the FCTM. Might not be pretty, but it can be done and it's ok on wet or slippery runways.
The 737 is the only jet I have experience on, but what I can say is that the rudder is incredibly powerful so all it takes is a very smooth application of rudder. And just when you think the amount of rudder you are applying is not enough, it's actually enough!
These are my 2 cents. New on type and still with too little exposure to crosswinds.