That might be viable if you had only one or two things to attack with, but in this case a heavy barrage from all sides helps to point out just what a defective person Biff Tannen is. Instead of thinking of precision sniping, think of putting him under heavy artillery pounding.
Now, it normally doesn’t make too much sense to copy what Republicans have been doing, but it cannot be denied that the constant, nonstop slandering of the Clintons did take its toll. And even though they were baseless lies, the constant, constant barrage did turn many people off of Hilary. So it doesn’t make sense to hold back now, every little aspect of the defective, malignant idiot known as Donald Trump needs to be thrown back at him, especially since all of it is true.