ice is the only thing you should ever mix whisky with, either bourbon or scotch. Three cubes and never more than two fingers, just to make sure the ice doesn’t melt and dilute fine whisky. Sometimes a glass of ice water to chase a sip with is acceptable.
Also mineral water (Perrier, etc) is most excellent as a side to a straight up shot of Jack. Try....you'll like. :-)
Forget diluting it with ice. Think whiskey rocks!