I prefer a forward cant in my strong side carry. Horizontal chest rig is best for combat imo. I don't care for cross draw at all. I think its purely for show and has limited functionality. I prefer a lumbar or weak side forward cant for a back up.
The forward cant allows the barrel to clear the holster with less vertical lift making presentation quicker. Puts the grip at a more natural angle to grasp when carrying behind the right hip. 4 o clock aprox. That's why its my preference.