I find this wrong. Because Most Weakening of Enfeebling weapons have a 17-20 crit range (with feat). Some people like me use Scimitars so 15-20. The Light mace is 20. Most people dont get the imp crit. So even with imp crit its 19-20. Bad Chance to lower dex significantly. compared to up to 6 str damage on a 25% bases.