From a practical standpoint I'd say a later than normal flare with a partial de-crab would be the sensible way to approach it on a real aircraft. The aircraft will easily cope with a significant amount of crab on landing. By attempting a full de-crab you leave yourself vulnerable to the possibility of an extended flare without crab, which will see you at best make a rather untidy 3 point landing or at worst being blown clean off the side of the runway. In terms of stopping there is little difference between full and idle reverse except noise and subequent brake temperatures. However if the runway is wet or slippery there is an increased possibility of control difficulties with full reverse. More important is to use medium autobrake to ensure the braking is prompt and positive. In summary, I'd plant it with medium autobrake, but be sure not to bounce it or you'll be going around.