I honestly don't think clutch is worth worrying about. Typically, a team might face 20+/- clutch opportunities in a single season. That's out of about 5700+ at bats. And most of the great hitters have neutral or negative clutch.
One recent team of mine in a 24 team league (Barnstormer Semifinals) finished second in the league in runs scored with a a 1-23 clutch result. The #1 run-scorer in the league had a 2-15 clutch. The #3 run-scoring team had an 0-12 clutch.
I just don't see any reward coming from the pursuit of positive clutch.
So, my advice is, draft good hitters and don't worry about clutch.