IR Spot Debate - Stashed Hold vs New Add - Help Needed

So I stashed Ertz on my IR spot when he was out last week to avoid dropping someone and was able to add Kroft. But my Dilemma now is I have Watkins to drop eventually when Ertz is back (bye week this week) and could drop Darkwa for Forte (if i win waiver bid) or I could just hold Darkwa and Watkins 1 more week before deciding. Long story short, is it stupid to take advantage of the IR spot stash and pass up an add like forte in place of Darkwa and Watkins, or smart as its one more week to figure out if anyone stars trending the other direction.