Flat out, clemency is in no way a wasted tool. Once you and your static are comfortable with an ex or savage fight, you probably won't need clemency. But to say it's a trash ability is just complete nonsense and undermining the purpose of even having it to begin with. Hell, if clemency is a trash tier skill, then so is shield bash. Why? Because it's only useful in situations and attributes nothing to dps. Might as well throw that off the hot bar too (sarcasm).